BK PRECISION Instruction Manual Model 2880B and 2890A Dual Display 51,000 count True-RMS Digital MultimeterSAFETY INFORMATION 3 QUICK START 5 MULTI-DISPLAY MULTIMETER 6 Mo INTRODUCTION wu ccc cccsecseeenseenseernesesscecsapessscececseserassneaessenaeesnaenensaceneaaes 6 GETTING START WITH YOUR METER q ME DISPLAY ILLUSTRATION ......ccc:cccsscccscccecsstecscsseacascesesecseseranseranensecnesseecssnaeennasereces 7 ME - ROTARY SWITCH... .ccccsccccsescessesssecescsscccsecsesesscsecseessecessrseransesaneessaserseacesrasssrseneress 8 Mo - TERMINALS (ieee. ccccececsecssceesseceerenessaceessssstecsausecessassessscausecseaaeeeansnensecsenensoene 9 M PUSH-BUTTON OPERATIONS .........ccccsceecescsseecseesesceecscsssesaneecatqatsnreenseeenee 10 POWER-ON OPTION ......... 13 MM - HOW TO ENTER SETUP MODE u....cccccccceecsssssescesseeeeesenseececssecsensraceressaceneeceseeeees 13 Mo - PACTORY DEFAULT... ccc cccsccccsn ccc cececeeeseseneesanesnsstceesecsncectenneenaaansegerrenonss 13 HE _- BAUD RATE 1... cscscsersecensesccceseccessseeseseesaceesssuceceeescsesnensonsecuseseaesesecaesecssensannasaeosens 15 MM EPARITY CHECK wou cece ccccecccccspcsscnssesnreneeeseasesseesceecncensenssieqanqasacensesensecdessese 16 ME DATA BUT vic ceccecceeeccccccaseccssscsusscescecscceceesensnnensnsesssecensesecensarssnensnansaseesegeecsccseeess 16 ME ECHO ooo cescsessncccepeececeesccecsessnesssescsscecsccacensscsnnansesecsnsaeconseseresessnensugananeasennscconsecees 17 ME OPRINT ONLY cooccei ccc ccccscesseensereaaceesesenessseenaeserecnssaeassaeaseussrepnegacensenensencssenses 17 M PERCENTAGE (%) SCALE FOR 4-20MA OR 0-20MA MEASURING ..........-.ceecssseees 18 Mo MINIMUM FREQUENCY MEASURING ........:cecesecesssseeerssreceecnsneteresaeeetsersceerseneasoses 19 M =- BEEP FREQUENCY occcccsccecsesessseecsessserenserseasenesensvsrsteeracepeceeseccecteccsseeuseaansscanees 20 M@ TEMPERATURE UNIT (REQUIRES OPTIONAL ADAPTER)....:-:c1:cc:csccssessseesneerseenees 21 M DATA HOLD/REFRESH HOLD ou... cccccssserseserscscssersasereccepeeceseessecceuseceesseseenense 22 MF ENVIRONMENT TEMPERATURE .....cecccconcsssererserereneessncecessenseetsesensesscerensesensasensaees 23 Me - AUTO POWER SAVING... csccessscseuscensnnerscresrersnaneysenssconceectaea case eseascenaesenserensens 24 M@ = THERMOCOUPLE TYPES (FOR MODEL 2890A ONLY) ......c ees cesscesescestenreneerees 25 ME -_- BACKLIT DISPLAY vices cccccccsscessccornersereeersnseseonececeesaecenscceersusueasaneacencauqaseneetennanens 26 ME _ DECIBEL TYPES......0...cccccccssrecsesseverscnsererserscnorerersessneeserseenseceeanseessssessnacaenensesaeaee 27 M = REFERENCE IMPEDANCE FOR DBM .....ceccsesscossscccsesereeserensecneestuceesecascsnscsneasantaners 28 Me - RESET TO DEFAULT .....scccssescscsscecsscecscesenenessecnsesenenessessegessssunecaseeassceeseeaaeneneonens 29 BARGRADPH....ccssssecsssesansnnsesnsssescacssnessssansssansacaanseesesescrsonevernaueasaees 30 A FREE-FOR-ALL APPLICATION FUNCTION 31 mM SQUARE WAVE OUTPUT (FOR MODEL 2890A ONLY).........cec:eeceeceeereseceets 31 ALERTING 34 Mm OVERLAOD ALERT FOR VOLTAGE MEASUREMENT............:::eeeecee 34 BM INPUT WARNING 2a ccc eeccsctseesssseeseersneseeranessseneesdeseeuececsseeeenenearaeaeeaeas 34 M = CHARGE TERMINAL ALERT uu... cccccescescssscesserscecncencsenecesrerseesedecsauacseecesnaerneaees 35 CAPACITY CHECK OF BATTERY ..........csccsssecssssssnnsanes 36 CALCULATION FUNCTION ..... 37M DYNAMIC RECORDING ....... cc cesescrcececsesestsccanseeeenesseeasraneersseasenstrsegereestee 37 Mo DATA HOLD... cc cccssceseeserececeeeeredsesuseseeasonsnnsnsasenaneusaeressneeaypasacenesteceaeres 39 M TRIGGER HOLD woe. ccseceeeeneccceecdenesnoceseseassesntanausnsanersssnsangersssnesceeeeaeeaes 39 BM = REFRESH HOLD 0... csessseesereceneccceeesnenaeesesnsesnusssuseasausrssaeeneansereesseesseaseaee 40 M = RELATIVE (ZERO) ......ccscccesscnssereretecsesessnansunserneesansnsnrentastenensesensaseescensesseseene 4] ME DECIBEL DISPLAY ......scessccssssecscorssecenconnceenecssessssencesasssauenssesssensanssesuenesentssceaeenaaes 42 WM PEAK HOLD in. ic cceesceesseseesrsnsssssneeseeseensrscerssesecsnauacescsararsasesersntarataneseansresnecees 44 REMOTE COMMUNICATION ......ccccsssssssssenserenennseees 46 MULTI-DISPLAY MULTIMETER...... 48 Me SELECTION BY HZ BUTTON 00.0... ees sesceeecesssenseseereceanenssascaceenenssensnevasronanseses ners 4B M SELECTION BY DUAL BUTTON (FOR MODEL 2B90A).......ccscccceeeeeteeteeeereteeees 50 M SELECTION BY DUAL BUTTON (FOR MODEL 2880B) uu... .cceseeeeseeeeesesereeens 33 m= OSHIFT FUNCTION BY BLUE BUTTON (FOR MODEL 2890A)....cc.cccsstseteeteeees 55 mM SHIFT FUNCTION BY BLUE BUTTON (FOR MODEL 2880B) ....-.. se ccccesesseeees 58 HOW TO OPERATE 60 M AC VOLTAGE MEASUREMENT .....0..2--.cccccccsesssessesssstsntetetesnsratsneseeceseentens 60 BM DC VOLTAGE MEASUREMENT ....1.222.0.--:ccccccsssseeeesseeeseerenseneetesneeeteneeens 61 ME MA MEASUREMENT ......:scccccsccsssessasseecessnesecoeseseesunscaseseseuenneseenareersereensanearapeceree 62 Me =- MA MEASUREMENT ......ccscsccseserssscerescrcssenssessensccseonsnseueessussseeecsnssenenreseseanesseeaees 63 ME % SCALE OF 4-20MA ... cc ccesccsscssssseenccnccesnecteassssenseonssnnuassesseesasavanespesscessesasneeaseas 64 HE A MEASUREMENT ........sccessessesessereercesceccessseesacacsncnsnaseseascsusensevernsnensevarerenstasaaeas 65 Me - FREQUENCY COUNTER ....cescecsceereeccssesseeass cecenensspesanersacaasennsrressnpecseseressassnaesnnanen 66 M@ RESISTANCE/ CONTINUITY MEASUREMENT .......c:ccscscrccscccteesetseeneneeens 68 M CONDUCTANCE MEASUREMENT ..........ccsccssseesereterssecesssecsescssensenenes 71 MM DIQDE CHECK 0... cecccceecsecscetsssaseneeneesanaeeeceereasssseseasaverressnscscesastacsesaesseneaseress 73 M CAPACITANCE... ..ccsecsececeessssteesassesseesersesensnatersssersceseesecssepecsscteesesenanenseaeensons 76 M@ BIPOLAR JUNCTION TRANSISTOR... cee teeeeseceeeeceeeeserenensenetsenanins 78 Me OFFET SWITCH TEST ooo ccccccescceeeceeeceeeeesseeneneseeearesstenssnanastesenesaessnensseerees 80 WM TEMPERATURE MEASUREMENT (OPTIONAL ADAPTER REQUIRED) .....cssscseseeeees B2 MM - SQUARE WAVE QUTPUT.........-.:ececssenseeserssrensusserenansrerseneeensecsesnsensaeseesennageennaaaes 84 SPECTIBICATIONG......sccscsssssssscssnssesssssnnsecss sesasoneonsesaccucnsnanaseenssaeeonenaeazensersseaseansensaaees 85 M GENERAL SPECIFICATION 0... eee ccssssssscscsesesserenceneceneesseeesseneatenssosesaees 85 M ELECTRICAL SPECIFICATIONS FOR MODEL 28904 0... cceseseeereeneceees 88 gw ELECTRICAL SPECIFICATIONSFOR MODEL 2880B ......... eee seeerernes 98 MAINTENANCE 104 MB SERVICE... ce eceeccsesseescsenssnsencarceneeerscascsncnssnceenssusasncsessnanuseusnersareccesctauenenes 104 mM BATTERY REPLACEMENT (UNIT DOES NOT COME WITH A Ni-MH BATTERY) 105 mM HOW TO CHARGE BATTERY (OPTIONAL ACCESSORY REQUIRED) .........--. 107 M@ = =FUSE REPLACEMENT .............:ccccccsssseseresenecersrsvsesncesseacesesaseannssuensnscsenersees 112 Mo CLEANING 0c ecseccensescennersaneseensnesneneeebesdseenscsenssasseesassseneesonseanenees 113 INCLUDE WITH THE RETURNED INSTRUMENT YOUR COMPLETE RETURN SHIPPING ADDRESS, CONTACT NAME, PHONE NUMBER AND DESCRIPTION OF PROBLEM. ......... 114SAFETY INFORMATION | This meter is a hand-held, battery-operated instrument for testing and troubleshooting power electronic systems. If this device is damaged or something is missing, contact the purchasing place immediately. A WARNING identifies conditions and actions that may cause hazard(s) to the user; a CAUTION identifies conditions and actions that may damage this Device. Following Table-1 explain international electrical symbols used on this meter. Table- 1 international Electrical Symbols AC - Alternating Current I)? DC - Direct Current AC and DC - Alternating and Direct Current Ground Double Insulation See Explanation In The Manual |e |O SAFETY INFORMATION A Warmings and Cautions To avoid electric shock, injury, or damage to this instrument and ensure that you use the meter safely, follow the safety guidelines listed below: Read this operation manual completely before using this device and follow all safety instructions. * This device is for indoor use, altitude up to 2,000m. Avoid working alone. Use the device only as specified in this manual; otherwise, the protection provided by the meter may be impaired. Never measure Voltage when the current measurement is selected. e Do not use this device if it looks damaged. Inspect the leads for damaged insulation or exposed metal. Replace damaged leads. e Disconnect the power and discharge all high-voltage capacitors before testing in the resistance, continuity, and diode function. e Be cautions when working above 70VDC or 33VRMS and 46.7V peak, such voltages may cause a shock hazard. e Always keep your hands behind the protective quard of the probe as measuring. e Select the proper function and disconnect the test leads from test points before changing functions. e Always use specified battery. The meter is safety-certified in compliance with EN61040 (IEC 1010-1, IEC 1010-2-031) Installation Category IV 6COV/ II] 1000V Pollution Degree 2. In order to maintain its insulation properties, please be sure to use with the standard or compatible test probes, CE requirement: Under the influence of RF field according to standard, the supplied test leads will pick up induced noise. To have better shielding effect, a short-twisted lead should be used.fh QUICK START AN WARNING Read "SAFETY INFORMATION" before using this device. Turn the function switch to select combined function for "V". Press the Dual button momentarily to set frequency measuring on secondary display. Connect the INPUT terminals by test leads to the source to be tested. Figure- 1 Dual display for ACV/Hz Measurement_ MULTI-DISPLAY MULTIMETER - gm INTRODUCTION The meter is robust for industrial fields and laboratories. The ambient temperature can be display with main measurement, which can help you to monitor the electrical value and record environment variation, simultaneously. Main Features: DCV, ACV, DCA, ACA, OHM, Diode check, Audible continuity, Temperature, Frequency, Duty cycle and Pulse Width tests AC+DC true RMS measurement for both voltage and current _ (model 2890A only) AC true RMS measurement for both voltage and current Ambient temperature display with main measurement Battery capacity indication Brightness LED backlight Resistance measurement up to 50MQ Conductance measurement from 0.01nS (100GQ) ~ 50nS Capacitance measurement up to 100mF. Frequency counter up to 20MHz The % scale readout for 4-20mA or 0-20mA measurement dBm with selectable reference impedance ims Peak hold te catch inrush voltage and current easily Temperature test with the selectable 0C compensation (optional Temp adapter required) K type temperature with environment compensation selection (optional Temp adapter required) Frequency, Duty cycle and Pulse width measurements. Dynamic Recording for Min/Max/Average Data Hold with Manual or Auto Trigger and Relative modes Diode and Audible Continuity Test Bi-directional optic computer interface with SCPE commands Safe, precision and speed closed case calibration 50,000 count precision True-RMS digital multi-meter and designed to meet IEC-1010 CAT. Ill 1000V and CAT. IV 600V standards Built-in rechargeable battery Smart Charger design without battery removal (optional accessory)m Display Illustration GETTING START WITH YOUR METER) Without ambient temperature compensation Square Wave Output for Hz, % (Model 2890A only} Thermal type for temperature test Alternating/ Direct Current Secondary Display for Square wave Output and other Remote control Secondary display units Auto Range Diode/Audible | GRIMES JL UT = Okt HM | Dynamic continuity 1 AUTO K B mits Recording Alternating/ 9 EL TRIG MAX MINAY % (0-20). 0-20mA Direct Current zr "4 ri tl 4 Vl 4 Vl 4 % [4-20[:4-20 mA ete Relative ah t ri 1 | im aI ri nF mVANF ee Mode A ee aS aE MkQHz~ Display units / g { 2 5 4 s1000 MS PLL. Pb. Pl. b.g.. pe. ..? +or- tigger | + AP slope for % and ee manne a ~=\ Measuring ms tests Range Low Battery Bar-graph display for input function Sign Auto Power Saving - HELE. Primary Display Data Hold (Manual Trigger} Figure- 2 LCD Displaym Rotary Switch Z\WARNING Be sure to remove the test leads from measuring source or target before changing rotary switch. FRM BEE Tae To turn this device ON and select a function you want by turning the rotary switch. Table- 2 Rotary Switch position Position - Function : rr czy o mV Resistance/ Continuity/ nS tH Hz (FC) ( Hz model 2890A only) Jk TEMP (TEMP requires optional adapter) 7 A o oo Sjapjen] 7 cw ho me MA coe A 10 OFF Figure- 3 Rotary Switch for selecting functionmB TERMINALS /\WARNING To avoid damaging this device, do not exceed the input ELC TATA ELE To avoid damaging the meter, do not exceed the input limit as below table: Table- 3 Input limit specification ROTARY SWITCH INPUT OVERLOAD FUNCTION TERMINAL PROTECTION V.O.%9+ cOoM 1000 V R.M.S. et V et V o mV Q 1000V for the circuits pL (Diode} <0.3A short circuit. Capacitance h Temperature 7 WA nA mA COM 440mA/ 1000V 30kA fast-acting om MA =~TA A COM 11A/ 1000V 30kA fast-acting JUL JUUL OUT OUT com Figure- 4 Terminalsm PUSH-BUTTON OPERATIONS The operation of push-button is shown as below. When push the button, a related symbol will be lit, and the beeper will sound. Turning the rotary switch to another position will reset current operation of push buttons. HOLD: Freeze to trigger next measuring value exit trigger hold. existing measuring value. Press again Press and hold for more than 1sec. to BLUE: To shift measuring function. : Press and hold for more than 1 sec. to see battery capacity O;: Press to toggle backlit ON/OFF REL: Set the value on the display to be subtracted. PEAK: Press and hold for more than 1 sec. to toggle PEAK Hold ON/OFF for VimA MAX MIN: Press and hold for more than 71 sec to toggle Dynamic recording mode. Press this button momentarily to cycle through MAX, MIN, AVG and present (MAX MIN AVG) readings at recording mode. Figure- 5 Pushbuttons RANGE: Change measuring range. AUTO: Press and hold for more than 1 sec. to set Auto-range DUAL: Select different combination displays START: Re-start peak or recording mode. Hz: Select Hz, % and Pulse width tests on Primary display. Press and hold for more than 1 sec. to quit. 101. AC/ DC (BLUE): Select Blue function Push this button momentarily to step through DC, AC for mV measurement. Push this button momentarily to step through DC, AC and % of mA for Current measuremeni. For Ohm test, push this button momentarily to step through continuity AR nS and Auto ranging Chm test. For Duty cycle and Pulse width tests, press this button for more than 4 second to change the trigger slope + I) or (Lh). For 5 / TEMP measurement, press this button to select Capacitance test, ETC ON (environment temperature compensation) and feel (non-ETC} temperature test. 2, HOLD: DATA HOLD (Trigger) or Refresh Data Hold (Auto trigger) Press this button momentarily to hold the existing displayed digital value and waiting for trigger. The sign of will be indicated. Press this button momentarily again to trigger another data hold. The sign of TRIG will be flashed before finished or updated measurement Press this button for more than one second to exit trigger mode. To select Refresh Hold by setup mode. The reading can be updated automatically when the reading is changed, and the beeper sounds a tone to remind user, simultaneously. 3. HOLD (MAX MIN): Dynamic Recording Record maximum, minimum, and calculates true average. Press this button for more than 1 second to toggle recording mode on or off at continuous mode (non data hold). Press this button momentarily to cycle through MAX, MIN, AVG and present (MAX MIN AVG} readings. The beeper sounds when a new maximum or minimum value is recorded. Press this button momentarily to cycle through Peak +, Peak reading after setting peak mode. The screen shows Lal@/MBJ MAX" to indicate the PEAK + and show Wal@/&J MIN to indicate the PEAK -. 4. REL (ZERO): Relative function 11 The relative function shows the difference between the measured value and the stored value. Press to toggle Relative (REL) ON or OFF. For Voltage and current measurements, press this button for more than 1 second to toggle 1 ms peak hold ON/OFF. The display will show Lu@/E@ MAX" to indicate the PEAK + and show Lal@JM8J MIN to indicate the PEAK -.5. RANGE: In auto-range, press this button to select manual range and turn off the sign of "AUTO". In manual range, press this button momentarily to step up 1 range at one time, press this button for more than 1 second to select auto-range. In auto-range, the " AUTO is lit and the meter will select an appropriate range for resolution if a reading is greater than maximum available range, " OL (overload) will be displayed on the display. The meter will select a lower range when reading is less than about 9% of full scale. Push this button momentarily to change measuring range and re-start the PEAK+ and PEAK- measuremenis after setting the peak mode. 6. DUAL: Dual Display Combination Press this button momentarily to select different combination displays. Detail combination displays, please refer to the chapter of MULTI-DISPLAY MULTIMETER. Push this button momentarily to re-start a new peak or recording mode after setting peak or recording mode. 7. Hz: Select Frequency, Duty Cycle and Pulse Width Tests For, Voltage or Current test, press this button momentarily to enter Frequency test and Voltage or Current will be indicated in secondary display. Press this button again to step through Frequency, Duty cycle, Pulse width test. Press this button for more than one second to come back voltage or current measurement. The combination displays by pushing Hz button, please refer to the chapter of MULTI-DISPLAY MULTIMETER. 8. O: BAT/ Back-lit @ Press this button for more than 1 second to see battery capacity. It will return to normal function automatically after 3 seconds. @ Press this button momentarily to toggle backlit ON or OFF. Backlit turns off automatically after setting period. 12 6How to enter setup mode Press and hold SETUP (Blue) bution, then turn rotary switch to any on position form OFF. Release push button when you hear a tone, the meter will enter setup mode then. These parameters will be remained in non-versatile memory even the meter is turned off. User can configure related parameters on setup mode by following procedures: 1. Press > (LEFT) or > (RIGHT) button to select which menu item to be set. 2. Press # (UP) or ~ (DOWN)" button to change the parameter. 3. Press BLUE button to select which digit to be adjust, the selected digit will be flashed. 4. Push "SAVE" button momentarily to save your change. 5. Push BLUE button for more than one second to exit setup mode. m Factory Default Following Table describes the outline of the setup menu item and indicates the factory settings. 13Table- 4 Descriptions for Outline of Setup Menu Item Menu item _ Factory Selectable Parameters Too athe Setting : a Baud Rate 9600 (2400, 4800, 9600, 19200 Parity None /Odd, even or none Data bits 8 8 bits or 7 bits (Stop bit is always 1 bit} ECHO OFF |ON or OFF Print OFF JON or OFF Percentage 4-20mA |4-20mA and 0-20mA for % scale readout Set minimum measuring frequency, 0.5Hz, Frequency / 0.5H2 [411 2Hz or SHz. The driving frequency can be set for 2400, Beep 2400 = 1200, 600 or 300 Hz. OFF means to disable beep. Four combinations can be selected: 1. C only Temperature n4 Cc 2. Cl oF can be selected. 3. Fonly 4. F/C can be selected. OFF means Data Hold (Manual Trigger), set Refresh Hold OFF = |100~1000 variation counts to enable refresh hald. Auto power off 45 1~99 minutes, OFF means to disable auto power off. . 1~99 seconds, OFF means to disable turning Backlit 30 off backlit automatically. Temperature K K type or J type type type or J typ decibel dBm = jdBm or dBV Reference impedance for dBm dispiay can be Ref 600% | set from 1~99990. Enable (On)/ Disable (OFF) Environment EtEMP OFF = [temperature (EtEMP) to be displayed with main measurements. Notes: 1. The temperature menu item will be selected by pushing O" button for more than one second to enter temperature option. 14m Baud Rate The baud rate is selected for remote control. It can be set to 2400, 4800, 9600 or 19200 Hz. To select your request as follows: 9600" | pusnw bAud |. PUSH & | tw i3ea0 bAud PUSH & | lw e4ad * bAud PUSH & | lw 48cad * PUSH & bAud Figure- 6 Baud rate setup for remote control 15m Parity Check The parity check is selected for remote control. lt can be set to none, even or odd bit. To select the parity as foliows: none PUSH PArey (_ PUSH A Vv [ add PArt pust A Vv [ En | PArEY i! Figure- 7 Parity Check setup for remote control BH Data Bit The data bit is selected for remote control. It can be set to 8 or 7 bits. The stop bit is defined to 1 bit and cant be changed. To select the data bit as follows: Got lpusHy dAtAb | _ ee dAtAb ~ Figure- 8 Data bit setup for remote control 16mg Echo With ECHO ON, the meter echoes (returns) all the characters whatever it receives. To enable the Echo as follows: OFF PUSH V Echo __ i PUSH A Vv Gn PUSH A Echo }~ Figure- 9 ECHO Setup Y m Print only If the remote interface of the meter is under Print-only mode, the meter will print out the measured data when the measuring cycle is completed. The meter will auto send the newest data to a host continuously. The meter doesn't accept any commands from the host under Print-Only enabled. The remote indicator of the meter will be flashed during operation as Print-only ON. To enable the print-anly as follows: OFF Print A PUSH PUSH A Vv ' Gn D- nk PUSH A { Figure- 10 Print-only Setup 7m Percentage (%) scale for 4-20mA or 0-20mA measuring To set the DC current measuring display with % scale readout. Set 4-20mA or 0-206mA for proportional to 0%~100%. The 25% scale readout represents DC 8mA at 4-20mA, and DC 5mA at 0-20mA. To set % scale proportional as follows: 1 m4 he cn mA Prenk PUSH a | Jw = ech mA Peent Figure- 11 The % scale Setup for mA measuring. 18m Minimum Frequency measuring Fo set minimum measurement frequency, will influence the measuring rate for frequency, duty cycle, and pulse width measurement. Normally, the measuring rate defined at general specification is based on the minimum frequency is 1 Hz. ns * PUSH Freq Fre ( J , + ~ - Pre4 PUSH & | 1 v 9 " PUSH reed Figure- 12 Minimum Frequency Setup 19m Beep Frequency The driving frequency can be set for 2400, 1200, 600 or 300 Hz. The beeper can be set to "OFF" as you want kept silent during operation, to select a tone you like according to follows: e400 * PUSH bEEP | a PUSH ad OFF | beEP PUSH a | |~ 300" beEP PUSH + | 7 600" | bEcP pus & | |~ 200" bEEP Figure- 13 Driving frequency of Beeper setup PUSH & 20Temperature Unit (requires optional adapter) i : i | A\ CAUTION Always set the temperature unit display for official requirements and comply with National law. a [EEETRTHPTSTSUSE ETT TASTEETE LETTER ETE I i Normally, the temperature unit is different for various areas. To select an official required scale unit by setup mode. Four combination displays can be selected: 21 1. Celsius only (C on primary display) 2. Celsius/ Fahrenheit (C/ F) display can be switched by pushing DUAL button. 3. Fahrenheit only (F on primary display) 4. Fahrenheit / Celsius/ (F/ C) display can be switched by pushing BUAL button. d-f Press button for - more than one E FAP second to enter temperature scale menu item 1 PUSH .& 4 w d-CF tEAP A PUSH & 1| dF tEAP A PUSH a q w PUSH g-FL PUSH KEnP | CO Figure- 14 Temperature Unit SetupHB Data Hoald/Refresh Hold Normal, factory default the hold mode to Data Hold (Manual Trigger by key/ BUS trigger by remote control). Set OFF for Data Hold (Manual Trigger), and set 100~1000 variation counts to enable Refresh Hold. The variation of measuring value exceed the setting of variation count, the refresh hold will be ready to trigger. To enable refresh hold as follows: OFF PUSH rhotd PUSH A 1 a rhoe | } PUSH A Figure- 15 Data Hold/ Refresh Hold Setup 22m Environment temperature Normal, factory default the environment temperature to be disabled. To enable this test accompanies with other functions, will slight reduce the display updated rate. You can know environment temperature with main parameter measurement as enabled environment temperature measurement. To enable environment temperature as follows: rFEEenre PUSH | | EEeEnr Figure- 16 Enable Environment Temperature display nes al = I 4 x = 23m Auto Power Saving The timer for APS (Auto Power Saving) can be set to 1~99 minutes, OFF means to disable APS. To set timer of APS as follows: &% m Cn PUSH : Some version |, Ao the APS is _. | indicated by | AoFF, beac nner PUSH y I w~ Ty om PUsH = | tw PUSH Figure- 17 Auto power saving setup The instrument may automatic turn off within a setting period, if none of the following happens. a. Push buttons are used. b. Measurement function is changed. c. Dynamic recording is set. d. 1ms peak hold is set. e. Auto power off has been disabled by Setup mode. You can tur the rotary switch to the OFF position, then turn on again to activate the meter after auto power off, or push any button to wake up. Only DUAL, RANGE, REL and HOLD buttons can wake meter up when set on square wave output (square wave output only on model 2890A). When the meter is to be used for longer periods, you may disable the APS. The sign "APS" will be turned off when APS disabled. The meter will stay on continuously as the APS is disabled. To shut off the meter by turning the rotary switch to the off position. 24= Thermocouple Types (For model 2890A only) The types of thermocouple sensor can be selected for J or K type. The default type is K type. To toggle the types as follows: n RYE beYPe mal Py ao ORME Figure- 18 Thermocouple Types 25= 6Backlit Display The timer can be set to 1~99 seconds, OFF means to disable turning off backlit automatically. The backlight will be turned off automatically after a setting period. To set the period as follows: Figure- 19 Backlit Timer Setup 26m Decibel Types The Decibel test can be selected for dBV or dBm. To toggle the types as follows: chm -. deeb PUSH a | |v diy ov dee bt Figure- 20 Decibel Types 27m= Reference impedance for dBm The reference impedance can be set from 1 to 99999, the default value is 600. To set the reference impedance as follows: mare | madi Push W r rer Figure- 21 Reference Impedance for dBm 28m= = 6Reset to Default Push SAVE button for more than one second to reset the optional value to factory default. The setup mode will be set to Baud Rate menu item automatically after finished reset. ee rEQEE | PUSH SAVE (HZ) for >1 second. Fut He a Ls Auld br Figure- 22 Reset to default 29The analog bar-graph likes the needle on an analog meter, but without the overshoot. The bar-graph updates are faster than the digital display. That is quite useful for making peak and null adjustments and observing rapidly changing inputs. The bar-graph would not be used for frequency, duty cycle, pulse width, 4-20mA % scale, 0-20mA % scale and temperature measurements. When the frequency, duty cycle and pulse width is indicated on primary display for voltage or current measurement, the bar-graph is presented for voltage or current value. When 4-20mA % scale or 0-20mA % scale is indicated on primary display, the bar-graph js presented for current value. The + or -" sign will be indicated when the positive or negative value has been measured or calculated, respectively. Each segment is presented for 25000 or 500 counts depended on the range value indicated on peak bar-graph. See below table: Table- 5 Bar-graph Counts Range Counts/ segment Used for the function Pec ebeeebe etic dead 25000 V, A, O, Diode 2 AAD LEDEAUORUEEEARULIE Pb FLLP TF 25000 V,A,O SVL PA 25000 V,A, 0, nS SLAM NADLL Plates. foocce.. 1000 500 v,A, SF SAUD LANAAOEN A UUEUOEAT a 9 lite... Foo 500 4k LATLLALELAULLTHADRL a Goce " 500 sh 2 30A FREE-FOR-ALL APPLICATION FUNCTION @ SQUARE WAVE OUTPUT (For model 2890A only) Square wave output which a unique function for unimaginable applications, for instances, PWM (Pulse Width Modulation) output, Adjustable Voltage Control, Synchronic clock (baud rate generator) etc. Also you can use to check and calibrate flow-meter displays, counters, tachameters, oscilloscopes, frequency converter, frequency transmitter and other frequency input devices. That is a free-for-all application function. Square wave output can set parameters for frequency and duly cycle. 1. How to select the square wave output function. JUL 1. Turn the rotary switch to the OUT output position. 2. The square wave output has 2 parameters can be set. Initial setting is frequency 150 Hz and duty cycle 50.000 %, respectively. 2. The 28 frequencies can be selected, please re refer below table: _ Frequency - 0.5, 1,2, 5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 100, 120, 150, 200, 2A0, 300, 400, 480, 600, 800, 1200, 1600, 2400, 4800 Hz To adjust the frequency according to following procedures: a. Press (LEFT) or "> (RIGHT)" button to select frequency cycling. The frequency will be indicated on primary display. b. Press Hz button will be same as P (RIGHT) button. Push Figure- 23 Frequency Adjustment for Square wave 3. Duty cycle adjustment To adjust the duty cycle in accordance with following procedures: 31a. Press "BLUE" button to select duty cycle display on secondary display. b. Press"*or* button to adjust the duty cycle. The duty cycle can be set for 256 steps and each step is 0.390625%. The display only indicates the best resolution with 0.001%. vor > C men 5 He Push t | WwW T y+ Set % no tar % ra no AFS Figure- 24 Duty Cycle adjustment for Square Wave 4. Pulse width adjustment To adjust the Pulse width in accordance with following procedures: a. Press "BLUE" button to select pulse width display on secondary display. b. Press "*"or"* button to adjust the pulse width. The pulse width can be set for 256 steps and each step is 1/ (256xfrequency). The display range will be adjusted automatically for the ranges of 9.9999~9999.9 ms. 3233 yf 395 Lt ms Push { "7 a. (i bt on APS Push i & L ww | S Set ms PSS ms Push ri Ww { Ri Hz APB Figure- 25 Pulse width adjustment for Square WaveALERTING m OVERLAOD ALERT FOR VOLTAGE MEASUREMENT spent cieurmeenee emer nnn Tm a ee dL rere nite ere Z\ WARNING For your safety, please be aware of the alert. Dont be nervous and just remove the test leads from measuring source. SEFTELTASERETATATEVES SUSE TaT TTS EEL TTA SFT This meter provides an overload alert for voltage measurement during auto-ranging mode or manual range can recognize 1010V. The beeper sounds tones periodically once the measuring voltage is exceeded alerting voltage of 1010.0V. For your safety, please be aware of this alert. gm INPUT WARNING The meter sounds alerting beep when the test lead inserted to A terminal but rotary switch didn't set mA/A function. The primary display will indicate Error and flash until the test lead removed from A terminal. rrereaor Figure- 26 Input Warning 34m Charge Terminal ALERT The meter sounds alerting beep when the ' - ! terminal detected a voltage level more than 3~5V and the rotary switch didn't set to _~_" position. The meter sounds alerting beep and primary display indicates and flashes "CH.Err until the lead removed from "LJ" terminal. For yA/mA measurement and square wave output would not recognize this alert. PHerr Figure- 27 Charge Terminal Alert 35Capacity check of battery This meter has provided battery capacity check. Press the button of BATO" for more than one second to see battery capacity. It will return to normal function indication automatically after 3 seconds. See following figure: Press BAT O for more than one second to see battery capacity The battery level will be indicated and flashed. Figure- 28 Capacity check of battery Bar-graph indicates 0~100% proportional to 6~10 Volts of battery level. The primary display will indicate existing battery capacity, and the battery level ts flashing. The bar-graph is indicated the capacity by percentage for proportional the voltage from 6.0V~10.0V. Baitery Voltage Proportional Percentage 6.0V~10.0V 0%~100% 36CALCULATION FUNCTION This device provides operators with various functions including: LO Dynamic Recording 01 Data Hold O Trigger Hold C1 Refresh Hold O Relative (Zero) 1 Decibel display O Peak Hold m DYNAMIC RECORDING The dynamic recording mode can be used to catch intermittent turn on or turn off surges, verify performance, measure while you are away, or take readings while you are operating the equipment under test and cant watch the meter. , The average reading is useful for smoothing out unstable or changing inputs, estimating the percentage of time a circuit is operated, or verifying circuit performance. The elapsed time will be indicated on secondary display. The maximum time is 99999 seconds. Over the maximum time, an OL will be presented. The operational procedures are described below: 1. Press "MAX e MIN" for more than 1 second to enter the dynamic recording at continuous mode {non data hold or trigger mode). The present value is stored to memories of maximum, minimum and average, also the MAX MIN AVG sign will be lit. Press "MAX e MIN button for more than 1 second to exit recording mode. Press "MAX e MIN" button momentarily to cycle through maximum, minimum, average and present readings as recording mode enabled. The MAX, MIN, AVG or MAX MIN AVG sign will be lit respectively to indicate which value is being displayed. See following Figure. Press DUAL (START) button to re-start recording mode. The beeper sounds when a new maximum or minimum value is recorded. If an overload is recorded the averaging function will stop. The average value becomes "OL "(overload). 7. The auto power saving feature will be disabled and the "APS" will be turned off at recording mode. 8. Selecting dynamic recording in auto range, it will record the value of MAX, MIN er AVG for different ranges. 9. The recording speed of dynamic recording in manual range is about 0.067 seconds approx. 10. The average value is the true average of all measured values taken since the recording mode was entered. wn on 37MmMrrin i AUTO RALALILS 6 s MAX MIN AVG IFIP For more than 1 sec,to togale a 4 Recording Biggs tercbees leet. eat Mode ON/OFF Hi Push Push MAS MIN + Far more than f 1 sec. riririr 1 i ALTO BILILILS Of $ to exit . MAX Recording a = __F yg 3g. ee L TRH Push Li om mba men non a has Do Limy muy mer Figure- 29 Display of Dynamic RecordingmB DATA HOLD The data hold function allows operators to hold the displayed digital value. The bar-graph didn't be held, still proportional to real measurement value. Press HOLD button to freeze the displayed value, and the sign of Lal@1&] wil! be displayed. sinintiiqitinit APs Figure- 30 Data Hold Operation Press HOLD button for more than one second to exit this mode. m TRIGGER HOLD Press HOLD button to freeze the displayed value and enter the manual trigger mode, and the sign of will be displayed. Press the button again to trigger another new measuring value updated to display. The sign of TRIG will be flashed before the new updates. Press HOLD button for more than one second to exit this mode. ATO SCH ari ips TRIG will be flashed Li i until new stable value Tin i a updated. Push a Hold again a Measurement AUTO aCETO 5p" iad | | J63c5 + reer APa + sininininiainia Figure- 31 Trigger Hold 39m@ REFRESH HOLD You can use the setup mode to enable the Refresh Hold when you are working on a difficult measuring field. This function will auto trigger or update HOLD value with new measuring value, and sound a tone to remind user. The operation of push-button is same as the operations of Data hold. Press "HOLD" button to enter Refresh Hold mode. The present value will be held, and the sign of Lal@JBB] will be lit. It will be ready to hold new measuring value once the variation of measuring value exceed the setting of variation count, and the sign of Lal@/B8J will be flashed. The hold value will be updated until the measuring value is stable, then stop flash and light Eale/@@ and sound a tone to remind user. i The sign Lal@JEB, ~ airy rt Vv will be flashed until pL Lf Li measuring value is Q 1 2 3. 4...7 stable and updated Measuring value changed over setting ua ensag: = =) 36325 Figure- 32 Refresh Hold 40For voltage and current measurements, the holding value will not be updated when the reading below 500 counts of minimum range. Function Range Limit Value DCV 5V~1000V +0,0500V DCmV 5OmV~1000mV +00.500mV ACV 5V~1000V 0.0500V ACmV 50mV~1000mV 00.500mV DCA 500uA~5000uA +005.00HA DCmA 50mA~500mA +00.500mMA DCA 5A~10A +0.0500A ACLA 500uA~5000UA 005.00pA ACmA 50mA~500mA 00.500mA ACA 5A~10A 0,0500A For resistance and diode measurements, the holding value will not be updated if the reading at OL" or open state. The holding value may not be updated once the reading cant reach stable state for all measurements. m RELATIVE (ZERO) The relative function subtracts a stored value from the present measurement and displays the result. 1. Press REL button momentarily to set the relative mode. This sets the display to zero and stores the displayed reading as a reference value and the sign of REL will be displayed. 2. The relative mode can be set at auto or manual range, but can't be set when an overload has occurred. 3. Press this button again to exit the relative mode. 4. When the Ohm measurement made is entered, the display will reads a non-zero value due to the presence of test leads. You can use the relative function to Zero-Adjust the display. 5. For DC voltage measurement, the thermal effect will influence the accuracy. Use relative function to zero the thermal effect. Short the test leads, press REL button momentarily as the display value is stable. ry Push REL rerery ri eee Figure- 33 Relative (Zero) Operation 41m Decibel display The dBm operation calculates the power delivered to a reference resistance to 1 milliwatt, and can be applied to Vdc, Vac and Vdc+Vac measurements for decibel conversion. Voltage measurement is converted to dBm by using the following formula: dBm = 10x fogi [1000 x (measuring value) /reference impedance] Push SHIFT button momentarily to toggle the dBm display on the primary display on AC voltage measurement. The bar-graph will be indicated AC voltage. The dBm display can be selected by push DUAL button. Only different is the AC voltage measurement will be indicated on secondary display. The reference resistance may be selected from 1~99990 by setup mode. The default value for reference resistance is 600Q. See the following figure: g 1 2 3 4 5 : . anti nAANAAN Push by (> Push by +_> WY + vain idiniit Figure- 34 dBm display 42 . f Deleted: }The decibel of voltage is calculated for above or below 1V. It can be selected by setup mode. It will be another temporary way to toggle dBV and dBm display by pushing SHIFT button for more than one second as dB selected. The formula is according to voltage measurement as below: dBV = 20 log. Vin Push SHIFT button momentarily to toggle the dBV display on the primary display on AC voltage measurement. The bar-graph will be indicated AC voltage. The dBV display can be selected by push DUAL button. Only different is the AC voltage measurement will be indicated on secondary display. See the following figure: e369. "0 1254" HE3BS eo + APE lg Eee wb te ee Fee ba a ot Figure- 35 dBV display 43m Peak Hold You can use this Meter to analyze components such as power distribution transformers and power factor correction capacitors. The additional features allow the measurement of the half-cycle peak voltage by using the peak hold feature. This allows the determination of the crest factor: Crest factor = Peak value/True RMS value 1. Press PEAK button for more than 1 second to toggle peak hold mode ON/OFF. 2. Press HOLD (MAXe MIN) button momentarily to show peak + or peak - value after setting the peak mode. The display shows Lal@lHBI MAX to indicate the PEAK + and shows MIN to indicate the PEAK -. See following Figure. 3. If the reading is "OL", then you can push RANGE button momentarily to change measuring range and re-start the PEAK measurement after setting the peak mode. 4. Press DUAL (START) button momentarily to re-start the peak hold again after setting peak mode. 5. According above measurement, the crest Factor will be 153.81/ 108.78 =1.414. 4445 DEALIRILS sai ann Push PEAK *to toggle KEY for more peak ON/OFF than I sec. ( ) push Max min [ Arnmnnm Auto HELE g | te toggle Peak+ AUTO LILILILILS s d Peak - MAX . ee , MIN aa . me =e @& y r = & @& & 04.8.8 4 Be ee ee + wee Eee e ete eed +1 \ / M ; Start to i Start to ~~ Capture + Capture ( rats ) [ ninnn RIRILALA | s RSLILILS & HAX Push Ch PIN a to re-start wi 4 7 Push ne saath Bae at eae #200000 to t Pp $ Bee ete ee tee eee te L + hain JandPeak- | fait | Push to change Push (RANGE) to change | measuring range measuring range [ ANNAN ) ( nnnnn DARI LILILS s ae s MAX MIN et ewowoewese yj ew eeee yy Figure- 36 Peak Hold Display- REMOTE COMMUNICATION This instrument has a bi-directional (full duplex) communication capability. This function will assist user to record and keep data easily. The protocol is provided by SCP! commands (Standard Commands for Programmable Instruments). You can simply use your familiar language to design what application software you want. All commands are combined by ASCII character, non-hexadecimal, which is much user friendly providing. Just configure the measuring range, and then get the measuring value. The detail SCPI for remote operation is accompanied with another file on the CD-ROM. Please refer to. An optional accessory includes an optical USB-RS232 cable and a CD-ROM for PC application software. See www.bkprecision.com Please refer following procedures if you want to communicate with personal computer: 1. Setup the communication parameters for the meter and the personal computer you used. The meter is default to (9600, n, 8, 1). 2. Be sure that the driver for USB and RS-232 transfer has been installed on your computer. 3. Fixes optic side of cable to communication port of meter, Be sure the text side to be face up. See following Figure. 4. The carrying case can be used as a stand. You can use short belt to buckle the cover. 5. Plug the other end of USB terminal of cable into USB port of personal computer, See following Figure. To USB of computer Figure- 37 Cable Connection for Communication 466. Execute the software to take the data as your needs. 7. Always press second snap slightly to remove the cable fram communication port of the meter. See the snap as below picture. Always press second snap slightly to remove the cabie from communication port of the meter. 8. We don't suggest you to remove the cover of USB-RS-232 cable. But sometime, you may press snap deeply and pull the cable to cause the cover to be moved out as following picture. To assemble the cover as contrary direction you moved out. Be sure the text side on the cover at same side of inside TOP case. You will hear a click as the cover has been fixed To assemble the cover as contrary direction you moved niitoe Sorts a Press the snap and pull the cable to mave out the cover 47MULTI-DISPLAY MULTIMETER The frequency measuring helps detect the presence of harmonic currents in neutral conductors and determines whether these neutral currents are the result of unbalanced phases or non-linear loads. m Selection by Hz Button For Voltage or Current test, press Hz button momentarily to enter Frequency test. Voltage or Current will be displayed on the secondary display, the frequency will display on the primary display. The bar-graph still used to display voltage or current value. Press this button again to step through Frequency, Duty cycle and pulse width tests. This allows simultaneously monitor the present levels and frequency (or Duty Cycle, or pulse width). Press Hz button for more than 1 second to return to Voltage or Current measurement. Function Primary display Secondary display AC Voltage Frequency (Hz) ACV Duty Cycle (%) ACV Pulse Width (ms) ACV DC Voltage Frequency (Hz) DCV Duty Cycle (%) DCV Pulse Width (ms) DCV AC+DC Voltage Frequency (Hz) AC+DCE V Duty Cycle (%)} AC+DC V Pulse Width (ms) AC+DC V AC Current Frequency (Hz) ACA Duty Cycle () ACA Pulse Width (ms) ACA DC Current Frequency (Fz) DCA Duty Cycle (%) DCA Pulse Width (ms) DCA AC+DC Current Frequency (Hz) AC+DC A (Model 2890A only} Duty Cycle (%) AC+DC A Pulse Width {ms) AC+DC A Frequency Counter Frequency (Hz) -1- (Model 2890A only} Duty Cycle (%) -1- Pulse Width (ms) -1- Frequency Counter Frequency (Hz) - 100 - (Model 2890A only) 48Amo eih Oa my LOLtLsLs oo Ft 2 3 4A ee ee ee | FOUDEREOTEREERMRMOMEEE APB Ly coe pon | CRE) ea AUTO ARERR 6 OV + OUR EREUUORRORSD DOMED APS pn | CE) =e ry AUTO te Hy =F cnn DOU o 4 2 38 4 #6 ms + OUETEERLOGRLOEERUNEE ==45 Figure- 38 Selecting by Hz button 49z Selection by DUAL button (For model 2890A) It is another way to have combination display. Press DUAL button momentarily to select different combinations of dual display. The DUAL button will be disabled as Recording mode or TRIG mode enabled. The combinations of dual display are shown as following table. Function Primary display Secondary display my ACV Hz {AC coupling) dBm or dBV ACV ACV Blank or Ambient Temperature =Zy ACV Hz (AC coupling) dBm or dBV ACV ACV DCV ACV Blank or Ambient Temperature Aly DCV Hz (DC coupling) dBm or dBV DCV DCV ACV DCV Blank or Ambient Temperature ~Ty AC+DC V Hz {AC coupling) dBm or dBV AC+DC V AC+DC V ACV AC+DC V DCV AC+DC V Blank or Ambient Temperature A DCpA Hz (DC coupling} DCpA ACLA DCuA Blank or Ambient Temperature yA ACnA Hz {AC coupling) ACpA DCpA ACuA Blank or Ambient Temperature A AC+DCuA Hz (AC coupling) AC+DCnA ACpA AC+DChA DC LA AC+DCuA Biank or Ambient Temperature 50Function Primary display Secondary display mA DCmA Hz (DC coupling) DCmA ACmA %(0-20 or 4-20) DCmA DCmA Blank or Ambient Temperature ~mA ACmA Hz (AC coupling) ACmA DCmA ACmA Blank or Ambient Temperature mA AC+DCmA Hz {AC coupling) AC+DCmA ACmA AC+DCmA DCmA AC+DCmA Blank or Ambient Temperature =~ A DCA Hz (DC coupling) DCA ACA DCA Blank or Ambient Temperature >A ACA Hz (AC coupling) ACA DCA ACA Blank or Ambient Temperature A AC+DCA Hz (AC coupling) AC+DCA ACA AC+DCA DCA ACt+DCA Blank or Ambient Temperature Temperature Celsius (C) Ambient Temperature Fahrenheit (F) Ambient Temperature. 51t ma +o APS a He AUTO RAIA AA eo Sere rene tee eee AUTO Berne tren eee ee eee Push : a alae AUTO ROLL See eee eee ee Figure- 39 Selecting by Dual button= Selection by DUAL button (For model 2880B) It is another way to have combination display. Press DUAL bution momentarily to select different combinations of dual display. The DUAL button will be disabled as Recording mode or TRIG mode enabled. The combinations of dual display are shown as following table. Function Primary display Secondary display m~ Vy ACV Hz (AC coupling) dBm or dBV ACV ACV Blank or Ambient Temperature mmm V DCV Hz (DC coupling) dBm or dBV DCV DCV Blank or Ambient Temperature = mV DCmV Hz (DC coupling) dBm or dBV DCmvV DCmvV ACmV DCmvV Blank or Ambient Temperature > mV ACmV Hz (AC coupling) dBm or dBV ACmMV ACmV DCmvV ACmV Blank or Ambient Temperature A DCnA Hz (DC coupling) DCLA ACpA DCLA Biank or Ambient Temperature A ACA Hz (AC coupling) ACpA DCpA ACuA Blank or Ambient Temperature ~mA DCmA Hz (BC coupling) DCmA ACmA % (0-20 or 4-20) DCmA DCmA Blank or Ambient Temperature mA ACmA Hz (AC coupling) ACmA DCmA ACmA Blank or Ambient Temperature 7A DCA Hz (DC coupling) DCA ACA DCA Blank or Ambient Temperature 53Function Primary display Secondary display A ACA Hz (AC coupling) ACA DCA ACA Blank or Ambient Temperature Temperature Celsius (C) Ambient Temperature Fahrenheit (F) Ambient Temperature. ao eb ~ Mong, AGED re ee | Figure- 40 Selecting by Dua! button= SHIFT Function by Blue Button (For model 2890A) Function Primary display in| ACV dBm or dBV DCV ACV DC+AC DCmvV ACmV DC+ACmV QO Continuity Q ns + pe Hz (Frequency Counter} CX/ Temperature CX Environment Temperature Compensation 0C (No ETC) A DC uA ACHA DC+ACyA = mA DCmA ACmA DC+ACMA (0-20 or 4-20) DCA ACA DC+ACA Hz with Duty cycle (%) Hz with Pulse width (ms) 55auto eth HE Ooo ~~ = none (Ho tel Figure- 41 Shift V function by Blue button 5657 a =Snininn,. | CouuUe * IE APS Push | GHEE AUTO 226 =r CuL oO +t %23 3&8 fF F Soe ee ee ee ewe aD Push | SHEE pe eee eee * PEERERGEE Figure- 42 Shift mA function by Blue buttonBE SHIFT Function by Blue Button (For model 2880B) Function Primary display mV ACV dBm or dBV === V/ DCV ~mvV DCmV ACmV 9 QO Continuity 0 ns jt ab CX/ Temperature CX Environment Temperature Compensation 0C (No ETC) =A DCuA ACuA ACmA %(0-20 or 4-20) ATA DCA ACA YICH9 meno Gt + APS Basa bean Teese Tenet ni? Figure- 43 Shift V function by Blue button 58Push | SHEE + En APS Figure- 44 Shift mA function by Blue button 59How to Operate _- m AC VOLTAGE MEASUREMENT The meter presents AC voltage values as R.M.S. (Root Mean Square) readings. The RMS value is the equivalent dc voltage that would produce the same amount of heat in a resistance as the measured voltage. This meter features TRUE-RMS readings, which are accurate for sine-waves and other waveforms (with no de offset) such as square waves, triangle waves, and staircase waves. Set the rotary switch to "~-V". Connect the Red and black test leads to "V" and O)" input terminals. Push DUAL to display frequency on secondary display. Touch the probes to the test points and read the display. BoaN > rere Pei Figure- 45 Line power Voltage measurement 60m DC VOLTAGE MEASUREMENT 4. Set the rotary switch to "=== 2. Connect the Red and black test leads to "V" and CO) input terminals. 3. Touch the probes to the test points and read the display. Figure- 46 Check the power source of transmitter 611. 2. 3. mB pA Measurement Set the rotary switch to "A", Connect the Red and biack test leads to "UA" and "COM! input terminals. Touch the probes to series connect to the test points and read the display. Figure- 47 pA Measurement 62mg mA Measurement 4. Set the rotary switch to" MA -A7~". 2, Connect the Red and black test leads to "A" and "224)" input terminals. 3. Touch the probes to series connect to the test points and read the display. Figure- 48 mA Measurement 63m= % scale of 4-20mA The % scale for 4-20mA or 0-20mA is calculated by DCmA measurement. It will optimize the best resolution automatically as below table. The RANGE button and bar-graph is used for ranging 50mA and 500mA. The % scale for 4-20mA or 0-20mA is set two ranges as follows: % (0-20 or 4-20mA) DCmA Always auto range Auto or Manual range 999.99% 50mA 9999.9% 500mA Transmitter CURRENT LOOP Figure- 49 % Scale of 4-20mA 64m= A Measurement 1. Set the rotary switch to" MA -A". 2. Connect the Red and black test leads to "A" and COM} input terminals. The meter set to the A measurement automatically when plugged test lead to "A terminals. 3. Touch the probes to series connect to the test points and read the display Figure- 50 A measurements 65EH Frequency counter The frequency count may use for low voltage application. Never measure the frequency to line power system. 1. Set the rotary switch to "+ Hz" position. 2. Press BLUE button to select frequency counter. 3. The secondary display shows the input signal will be divided prior. The -{-" and -100-" are divided signal to 1 and 100 respectively. 4. Connect the Red and black test leads to "V" and COM" input terminals. 5. Touch the probes to the test points and read the display. 6. If the reading is unstable or zero, push DUAL button momentarily to select signal divide 100. 7. Ifthe reading is unstable, that means the signal is out of the specification. 8. Push Hz bution momentarily to step through duty cycle, pulse width and frequency measurement as the secondary display indicated "-1-". 6667 Figure- 51 Frequency Countera RESISTANCE/ CONTINUITY MEASUREMENT A\ Caution To avoid possible damage to the meter or the equipment under test, disconnect circuit power and discharge the capacitor before measurina capacitance. The meter measures resistance by sending a small current through the circuit. The unit is the ohm (0). For Ohm test, press SHIFT button momentarily to select Audible continuity, Conductance and Resistance measurements. The continuity range is set to 0-500.002. While testing continuity, the beeper will sound if the resistance falls below 102. wm =D ri 1 aoe a fn | + bidinidiniainAiiniiin a6 | PUSH | Audible - Continuity P43 c Fe ih rh ol ae 10 i LAAT are | PUSH | (SHIFT) a3 | nnnnn = ahah cata Figure- 52 Select Continuity 68For other ranges, the beeper will sound if the resistance falls below the typical values indicated in below table. 69 Table- 6 Beeper Responses in Continuity Test Measuring range Beeper On if 500.00 <10 0 5.0000 kQ <100 50.000 kQ <1 kQ 500.00 kQ <10 kQ 5.0000 MO <100 kQ 50.000 MQ <1 MO Set the rotary switch to "Q". Connect the red/ black test leads to "Q" and " " input terminals, respectively. Touch the probes to resister (or shunt) and read the display. Press BLUE bution momentarily to select Audible continuity function. The continuity range is 0-500.00a. While testing continuity, the beeper will sound if the resistance falls below 109 in the range of 500.000.Figure- 53 Resistance measurement 70m CONDUCTANCE MEASUREMENT Conductance is the reciprocal of resistance. High values of conductance correspond to low values of resistance. The unit of conductance is the Siemens (S). The 50 nS range measures conductance in nano-siemens (1 nS = 0.000000001 Siemens). Because small conductance correspond to extremely high resistance, the n& range lets you easy calculate and determine the resistance of components up to 100 GO (1 nS = 1,000 MO= 1GQ) 1. 2. on 71 Set the rotary switch to "Q. Connect the red/ black test leads to "2" and " CO") " input terminals, respectively. Press SHIFT button momentarily to select conductance measurement. Touch the probes to resistor and read the display. High-resistance readings are susceptible to electrical noise. Use averaging to smooth out most noisy readings. Refer to Dynamic recording mode.Figure- 54 Conductance measurement T2m DIODE CHECK A good diode allows current to flow in one direction only. To test a diode, turn the power off, remove the diode from the circuit, and proceed as follows: 1. 73 Set the rotary switch to "->-" position. Connect the red/ black test leads to "-PF" and OM)" input terminals, respectively. Touch the red lead to the positive (anode) side of the diode and the biack lead to the negative side (cathode, side with band or bands). The meter can display diode voltage drops to approximately 2.1 V. A typical voltage drop is 0.3V~ 0.8V and the meter will sound a beep to remind user. Reverse the probes and measure the voltage across the diode again. If the diode its: Good: "OL" is displayed. @ Short: Near 0 V drop is displayed in both directions, and the beeper sounds continuously. @ Open: "OL" is displayed in both directions. Repeat step 3 and 4 for other dicdes.Figure- 55 Forward Bias of Diode Measurement 7475 APS Figure- 56 Reverse Bias of Diode Measurementm CAPACITANCE LFALLEEEEECERESERITIERERTEEEEEEESSEESIILEELETEEELEEEERUETERETES EIT EREREEE IES ER SS Siti ghee SEG ERESEa SETS UE TEE ihn 4. Caution To avoid possible damage to the meter or the equipment under test, disconnect circuit power and discharge the capacitor before measuring capacitance. Use the DC voltage function to confirm that the capacitor has been discharged. Capacitance is the ability of a component to store an electrical charge. The unit of capacitance is the farad (F}. Most capacitors are within the range for nanofarad (nF) to microfarad ({F). The meter measures capacitance by charging the capacitor with a known current for a known period of time, measuring the resulting voltage, and then calculating the capacitance. The larger capacitors will take longer time to charge. The sign of 4 Lk means charging capacitor, and the sign of LI: means discharging capacitor. To improve the measurement accuracy of small value capacitors, press REL with the test leads open to subtract the residual capacitance of the meter and leads. Measuring tip: For measuring the capacitor more than 10000pF, it suggested to discharge capacitor first and selected suitable range to measure it. That will speed up measuring time for get the correct value. 1. Set the rotary switch to wg b position. 2. Connect the red/ black test leads to "Ih" and " " input terminals, respectively. 3. Be sure the polarity for capacitor, red probe shall be touched +" end of capacitor. 4. Read the display. amo cib aro cib rue] (0000, | 0004. 009 000 + siaiiaidingiaiayitiiT APS HiT APS Disaharging Charging 767? Figure- 57 Capacitance measurementmB BIPOLAR JUNCTION TRANSISTOR The BJT (bipolar junction transistor) is composed of input and output circuits by using one of electrodes namely, emitter, base, or collector as the common terminal. The transistor has polarities for PNP or NPN type. To get the related data sheet from manufacturers will be highly recommended. Sometime it will waste time. You can recognize the transistor by this meter. Following procedure may guide you how to recognize the polarities and poles of a transistor: How te recognize NPN/PNP 1. Set the rotary switch to "-"position. 2. Connect the red/ black test leads to -bL" and "COM!" input terminals, respectively. The "+" end of input provides positive test voltage. 3. Assume number 1, 2, and 3 for a TO-92 transistor as following Figure. TO-92 Most TO-92 transistor, the pin 1 is always emitter. 123 EcH or EBC Figure- 58 TO-92 Transistor 4. Touch pin 1 by red probe, and pin 2 by Black probe. If the measuring is OL, reverse the probes. If the measuring value is still OL. You can assume both pins would be Emitter and Collect poles. The residual pin 3 is Base pole. Always to find out which pin is Base pole first. Refer to following Table: PIN Probe Red/Black | Probe Black/Red Base 1-2 OL OL 3 4-3 OL OL 2 2-3 OL OL 1 5. Touch Base pole by RED probe, and connect black probe to other pins. Record the reading. Reverse the Red/ black probes. Record the reading. Then recognize the polarities (NPN or PNP} and Poles according to following table. The Vbe is always greater than Vbc. Most TO-92 transistor, the pin 1 is always emitter. Anyway, please check related data sheet from Manufacturers according. See following Table 78Base =Pin 3 PIN 3-1 3-2 Pole (123) NPN/PNP Probe (Vbe>Vbc) Red/Black 0.6749V 0.6723V ECB NPN 0.6723V 0.6749V CEB NPN Black/Red 0.6749V 0,6723V ECB PNP 0.6723V 0.6749V CEB PNP Base= Pin2 PIN 2-1 2-3 Pole (123) NPN/PNP Probe (Vbe>Vbc) Red/Black 0.6749V 0.6723V EBC NPN 0.6723V 0.6749V CBE NPN Black/Red 0.6749V 0.6723V EBC PNP 0.6723V 0.6749V CEB PNP Base=Pin 1 PIN 1-2 1-3 Pole (123) NPN/PNP Probe {(Vbe>Vbc) Red/Black 0.6749V 0.6723V BEC NPN 0.6723V 0.6749V BCE NPN Black/Red 0.6749V 0.6723V BEC PNP 0.6723V 0.6749V BCE PNP 6. The other type TO3 package as following drawing TO3 Normally, the case is Collector pole. Figure- 59 TO-3 Transistor For example of 2N3055, a silicon NPN high power transistor, According to previous procedures, the base pole will be pin 2. Base= Pin2 PIN 2-1 2-3 Pole (123) NPN/PNP Probe {Vbe>Vbc}) Red/Black 0.5702V 0.5663V EBC NPN 79m JFET SWITCH TEST The JFET (Junction Field-Effect Transistor) is composed of input and output circuits by using one of electrodes namely, Drain, Gate, or Source as the common terminal. The JFET has different type for P or N channel switch. To get the related data sheet from manufacturers will be highly recommended. You can recognize the JFET by this meter. Following procedure may guide you how to recognize JFET. Set the rotary switch to "Q" position. Connect the red/ black test leads to "Q" and "COM)" input terminals, respectively. The (2 end of input provides positive test voltage. Assume number 1, 2, and 3 for a TO-92 JFET as following Figure. TO-92 Most TO-92 JFET, the pin 1 is always Drain. 123 DGS or DS6G Figure- 60 TO-92 JFET Touch pin 1 and pin 2 by red and black probes, to get the value. Then reverse the probes. If the two measuring value is < 1kQ. You can assume both pins would be Drain and Source poles. The residual pin 3 is Gate pole. Aiways to find out which pin is Gate pole first. Refer to following Table: PIN Probe Red/Black Probe Black/Red Gate 1-2 <1kO <1kO 3 1-3 <1kO <1kO 2 2-3 <1kO <1kQO 1 No To judge P-channel switch or N-channel, by constant voltage source and verify the RDS (Drain-Source on Resistance). Normal, both channel types wiil be switched when VGS) is equal to 0 V. Connect the input probes to Drain and Source poles. Then connect the red output alligator through a resistor of 100KQ to Gate pole, the black output alligator to black input probe. if the Ros increased as the V (GS) is negative voltage, this JFET will be N-channel. You can set DC power supply voltage output from +00.000V to 80-15.000V, and the Ros will be increased until "OL" of resistance measurement. You will know the cutoff voltage for this N-channel switch. Ros TO.92 DC power supplier J113 Ta Meter Black COM (= JA Figure- 61 N- Channel JFET 9. Ifthe RDS increased as the V (GS) is positive voltage, this JFET will be P-channel. You can set DC power supply voltage output from 0.000V to +15.0G0V, and the RDS will be increased unti] "OL" of resistance measurement. You will know the cutoff voltage for this P-channel switch. Ros TO.92 DC power supplier 085.00 2 W174 oun) +00.00 v q ecm +15,00 y Ta Meter Black a) p= Figure- 62 P- Channel JFET 81m Temperature Measurement (optional adapter required) A\ CAUTION Do not bend the thermocouple leads, sharply. Repeatedly bending the leads can break them. INTEC ETAT ay The bead type thermocouple probe is suitable for making temperature measurements from -40C (F) to 204C (399F) in Teflon compatible environments. Above this temperature, toxic gas might be emitted. Do not immerse this thermocouple in liquids. For best results, use a thermocouple probe designed for each application (i.e. an immersion probe for liquid or gel, an air probe for air measurements, etc.}. Follow the measuring techniques as below: @ Clean the measurement surface and make sure the probe is attached securely to the surface. @ When measuring above ambient temperatures, move the thermocouple on the surface until you get the highest temperature reading. @ When measuring below ambient temperatures, move the thermocouple on the surface until you get the lowest temperature reading. @ The sensor plugged into meter shall be putted on the operating environment for 4 hour at least. @ = If you want to have quick operation, please use the 0C compensation to see the temperature variation of the thermocouple sensor. The 0C compensation will assist you to measure relative temperature immediately. Turn the rotary switch to CX/TEMP position. Press BLUE button select temperature measurement. Plug the adapter with thermocouple probe into the "TEMP" and "COM" input terminals. 4. Attach the thermocouple to the surface being measured. 5. Read the display. 6. If you are working on a varied environment, which the ambient temperature is non-constant. It is another way to quickly measure the relative temperature by compensation. Press "SHIFT" button to select (0 C| compensation. 7. Dont touch the surface you want to measure by thermocouple probe. Wait for a constant reading, then press REL button to the reading to be relative reference temperature. Attach the thermocouple to the surface being measured 9. Read display for the relative temperature. on > co 8283 PUSH Figure- 63 Surface temperature measurementm Square Wave Output (Model 2890A only) You can use square wave outputs as a source, for examples, Oscilloscope, Digital multi-meter, Buzzer etc, 1. 2. ~ oo me ta fo set the rotary switch to on" position. Connect the Red and black alligator clips to wot and COM output terminals. Connect the an end of meter to the probe of an oscilloscope Connect the C2)" ends of meter to the ground of an oscilloscape. Use an oscilloscope to monitor the wave change. Set duty cycle to 50.00%. Set square wave output value to 100Hz/ 50.00% for checking the Horizontal timing scale of an oscilloscope. To select different frequency, and vary the duty cycle. OSCILLOSCOPE Figure- 64 Square Wave Output 84SPECIFICATIONS = m@ GENERAL SPECIFICATION Display: @ Both primary and secondary displays are 5-digit liquid crystal display (LCD) with maximum reading of 51000 counts. @ Automatic polarity indication. Function: @ DCV, ACV, DCA, ACA, OHM, Diode check, Audible continuity, Temperature, Frequency, Duty cycle and Pulse Width tests. Including AC+DC true RMS measurement for both voltage and current. Environment temperature indication with each measurement. dBm with selectable reference impedance and dBV measurement Frequency-counter measurement up to 20MHz. 1-ms peak hold for capturing glitch easily. The % scale readout for 4-20mA and 0-20mA measurement A unique square wave output with 28 types of frequency and adjustable duty cycle. Battery capacity indication. EL Backlit display for easy reading in the dark. Min/Max/Average, Data Hold with Manual or Auto Trigger and Relative modes @ = Bi-directional aptic computer interface with SCP! commands @ One-year calibration cycle suggested. Measuring rate (Approx.): Function ; Measuring Rate (approx.) ACV 3.75 ACV +dB 3.75 DCV {V or mV) 3.75 ACV (V or mV} (2890A) 3.75 AC+DC V (V or mV) (2890A) 1.65 Of nS 7.5 Diode 7.5 Capacitance 4 (< 100uF) DCA (HA, mA or A) 3.75 ACA (uA, mA or A) 3.75 AC +DC A (yA, mA or A) 1.65 (2B90A) Temperature 3 Frequency 1.12 (>1Hz)} Duty cycle 1.12 (>1Hz) Pulse width 0.56 (> 1Hz) 85Low hattery indicator: The "Ml" appears when the battery voltage drops below 6.0V (approx.). Operating temperature: from 0C to 50 C. Storage temperature: -20C to 60C with battery removed. Relative Humidity (R.H.): maximum 80% R.H. for temperature up to 31C decreasing linearly to 50% R.H. at 50C Temperature coefficient 0.15x (specified accuracy) / C (from OC to 18C or 28C to 50C) Common Mode Rejection Ratio (CMRR): >90 dB at DC, 50/60 Hz+0.1% (1kQ unbalanced) Normal Mode Rejection Ratio (NMRR): > 60 dB at 50/60 Hz+0.1% Power supply: Single standard SV Baitery can use Alkaline or Carbon-zinc. Battery types ANSI/ NEDA IEC Alkaline 1604A 6LR61 Carbon-zinc 1604D 6F22 The rechargeable battery should be 9V Ni-MH (Nickel-Metal Hydride battery) Power Consumption: 480mVA maximum with backlit Battery life: m 24 hours for DC voltage measurement {approx.} (The new Ni-MH 170mA batteries have been fully charged.) m &80hours for DC voltage measurement (apprex.) (Based on new alkaline 9V/545mMAH Battery) Charging time: <135 minutes approx. at the environment of 10C to 30 C. (If the battery has been deep-discharged, a prolonged charging time is required to bring the battery back to full capacity.) Dimension: 41 (H) * 90 (WW) * 192 {L} mm without holster. Weight: 675 grams with holster and battery/ 936 grams with full package Standard Accessories: Test leads (a pair), Starting Guide, Instruction manual and 9V battery. Optional Accessories: Communication package, 9V NiMH battery, external adaptor, power cord, Thermal input adapter and Thermocouple probe. 86Safety: Designed in compliance with EN61010-1 (IEC1010-1) for CAT-III {Q00V and CAT-IV 600V, Pollution Degree || Environment. EMC designed in compliance with EN61326. 87m@ ELECTRICAL SPECIFICATIONS FOR MODEL 2890A Accuracy is given as +(% of reading + counts of least significant digit) at 23C + 5C, with relative humidity Less than 80% R.H. O DC mV! Voltage ; Overload Range Resolution Accuracy Protection 50mV 0.001mvV 0.05% +50 *N2 1000V for the 500mvV 0.01mV circuits <0.3A 1000mV 0.1mV 0.025% +5 short circuit. 5V 0.0001V 50V 0.001V 1000V 500V 0.01V 0.03%+5 1000V 0.1V Notes: 1. input impedance: >1GQ for 50mV~1000mvV ranges. For 5V~1000V ranges, 1GM& (nominal) for single display and parallel connected with1.1MQ as dual display. 2. The accuracy could be 0,05%+5, always use relative function to zero thermal effect (short test leads) before measuring the signal. OAC mV/ V (TRUE RMS: From 5% to 100% of range} . case Aeayrac co : Range | Resolution |. -asca he] an-10k * Tok~20k He [20k~100k He 50mV | 0.00imV | 1%+60 | 0.4%+40 | 0.7%+40 | 1.5%+40 |3.5%+120 500mvV] 0.01mV 1%t60 | 0.4%+25 | 0.4%425 | 1.5%+40 13.5%+120 1000mV] O.1mV 1%+60 | 0.4%425 | 0.4%425 | 1.5%+40 13.5%+120 5V_ | 0.0001V | 1%+60 | 0.4%+25 | 0.4%+25 | 1.5%+40 13.5%+120 50V | 0.001V. | 1%+60 | 0.4%+25 | 0.4%+25 | 1.5%+40 (3.5%+120 500V 0.01V 1%+60 | 0.4%+25 | 0.4%+25 | 1.5%+40 | 3.5%+1203 1000V 0.1V 1%+60 | 0.4%+40 | 0.4%+40 |1.5%+40-a1 No spec. Notes: 1. 2. 3. Overload Protection: 1000V R.M.S.; 1000V R.M.S5. for the circuits <0.3A short circuit for mV ranges. input impedance: >1GQ for 50mV~1000mvV. 1.4MQ (nominal) in parallel with <100pF for 5V~1000V ranges Input voltage is lower than 200Vrms. Crest factor<=3 88CO AC+DC mV/ VOLTAGE (TRUE RMS: From 5% to 100% of range) : Accurac Range Resolution 30~45 Hz 45~1k Hz | 1k~10k 7 10k~20k Hz |20k~100k Hz 50mvV | 0.001mV | 1.2%+80 | 0.4%+60 | 0.7%t60 | 1.5%+60 |3.5%+220 500mV] 0.01imvV | 1.2%+65 | 0.4%+30 | 0.4%+30 | 1.5%+45 13.5%+125 1000mV| O.imV | 1.2%+65 | 0.4%+30 | 0.4%+30 | 1.5%+45 13.5%+125 5V G.0001V | 1.2%+65 | 0.4%+30 | 0.4%+30 | 1.5%+45 |13.5%+125 50V 0.001V | 1.2%+65 | 0.4%+30 | 0.4%+30 | 1.5%t45 13.5%+125 500V 0.01V 1.2%+65 | 0.4%+30 | 0.4%+30 | 1.5%+45 | 3.5%+1253 1000V 0.1V 1.2%+65 | 0.4%+45 | 0.4%+45 |1.5%+45-3] No spec. Notes: 4. Overload Protection: 1000V R.M.S.; 1000V R.M.S. for the circuits <0.3A short circuit for mV ranges. 2. Input Impedance: >1GQ for 50mV~1000mV. 1.1MQ (nominal) in parallel with <100pF for 5V~1000V ranges 3. Input voltage is lower than 200Vrms. 4. Crest factor<=3 1 dB (decibel calculation) dB base Reference Default Reference imW (dBm) 7~99990 6000 1V (dBV) 1V 1V Notes: 1. 89 The reading of dBm is indicated in decibels of power above or below imW, or decibels of voltage above or below 1V. The formula is according to voltage measurement and specified reference impedance. Its accuracy is depended on the accuracy of voltage measurement, and an additional calculation error of 0.3dB should be added. Auto-ranging mede is used as selected decibel function. The bandwidth is according to voltage measurement.O DC CURRENT _ . Burden Voltage Overload Range |Resolution Accuracy / Shunt g Protection 500nA | 0.01nA 0.05% +5 -n1 0.05V (1000) 440mA 5000uA} 0.1pA 0.05% +5 -n1 0.5V (1000) 10x38mm 50mA | 0.001mA 0.15% +5 nt 0.08V (10) AC/DC 1000V 500mA | 0.01mA 0.15% +5 ns 0.8V (10) 30kA/ fast-acting 5A 0.0001A 0.2% +10 0.7V (0.010) 11A 10A -n2 } 0.0007A 0.2% +5 0.21V (0.010) Notes: 4. Always use relative function to zero thermal effect with open test lead before measuring the signal. If not use Relation function, additional 20 digits to the accuracy. The thermal effect could be occurred as follows: @ Wrong operation to measure the high voltage of 50V~1000V for resistance, diode, and mV measurements. m@ After battery charging completed. m@ After measuring the current greater than 500mA, itis suggested to cool down the meter for two times of measuring time you applied. 2. 710A continuous, and the additional of 0.5% to specified accuracy as measure the signal greater than 10A~20A for 30 seconds maximum. After measured current for > 10A, to cool down the meter for two times of measuring time you applied before low current measurement. CO} AC CURRENT (TRUE RMS: Erom 5% to. 100% of range) St te J Accuracy Range |Resolution oe tis | aecak biz | 2kcD0k He |20k~100k Hz 5O00uANa| 0.01nA 1.5% +50 0.7% +20 3% +80 5% +80 5000nA | 0.1nA 1.5% +40 0.7% +20 3% +60 5% +80 5OmA | 0.001mMA |] 1.5% +40 0.7% +20 3% +60 5% +80 500mA | 0.01mA 1.5% +40 0.7% +20 3% +60 5% +80 5A O.0001A | 2% +40:na 0.7% +20 3% +60 No Spec. 4OA-n2 | O.0001A | 2% +40-na 0.7% +20 | <SA/ S5kHz No Spec, Note: 1. Overload protection: Fast-acting fuse 0.44A for < 500mA, and 11A for BAIMOA. 2. 10A continuous, and the additional of 0.5% to specified accuracy as measure the signal greater than 10A~20A for 30 seconds maximum. After measured current for > 10A, io coo! down the meter for two times of measuring time you applied before low current measurement. 3. Input current < 3Arms 4. Input current >35pArms 5. Crest factor<=3 90O AC+DC CURRENT (TRUE RMS: From 5% to 100% of rande.) Range |Resolution Accuracy Overload 30~45 Hz | 45-2k Hz | 2k~20k Hz Protection 500A-na] 0.01pA | 1.6% +55 | 0.8% +25 | 3.1% +85 440mA 5000HA | O.1pA | 1.6% +45 | 0.8% +25 | 3.1% +65 10x38mm 50mA | 0.001mA | 1.7% +45 | 0.9% +25 | 3.2%+68 | AC/DC 1000V 500mA | 0.01mA | 1.7% +45 | 0.9% 425 | 3.2% 205 [OY fastacting 5A | 0.0001A [2.2% +50-na| 0.9% +30 | 3.2% +70 1A 10A n2 | 0.0001A [2.2% +45-nal 0.9% +25 | <SA/SkKHz Note: 1. Overload protection: Fast-acting fuse 0.44A for < 500mA, and 711A for B5A/1OA. 2. 10A continuous, and the additional of 0.5% to specified accuracy as measure the signal greater than 10A~20A for 30 seconds maximum. After measured current for > 10A, to coal down the meter for two times of measuring time you applied before low current measurement. oe we Input current < 3Arms Input current >35yArms Crest factor<=3 1] PEAK HOLD {Capturing changes) Signal width Accuracy for DC mV/ Voltage/ Current Single event >1ms 2%+400 for all ranges Repetitive >250us 2%+1000 for all ranges 81O RESISTANCE Range | Resolution Accuracy Test current Overload Protection 5000 :nsa 0,010 0.05% +10 1.0mA 5kQ -na_| 0.0001k 0.38mMA 50kO 0.001kO 0.05% +5 38nA 1000V 500k 0.01k92 3.8nA R.M.S. 5MO | 0.0001MQ 0.15%+5 345nA *N1 5OMQ na | 0.001MQ 1% +6 206nA 5OOMQ | 0.01Ma2 | 3%+10<200MQ 200nA 8%+10>200MQ 500nSns | O.0%nS 1%+10 200nA Notes: 4. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 2. Maximum open voltage: <+4.8V 3. The accuracy of 5009 and 5kQ is specified after Relative function, which is used to substrate the test lead resistance and the thermal effect. 4. For the range of 50MQ, the RH is specified for < 60%. 5. The accuracy is specified for <50nS and after Relative function as open test lead. 6. Instant Continuity: Built-in buzzer sounds when resistance is less than 10.0 (1 DIODE CHECK/ AUDIBLE CONTINUITY Range|. Resolution Accuracy Test Current | Open Voltage Diode 0.1 mV 0.05% +5 Approx. 1.0mA | <+4.8V DC Notes: 1. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 2. Built-in buzzer sounds when reading is below 50 mV approx. 92O CAPACITANCE Range Resolution Accuracy Measuring rate as full scale 10,000nF 0.C01nF 1%+8 100.00nF 0.01nF 1000.0nF 0.1nF 4 times/ sec. 10.000puF 0.001 nF 1%45 100.00UF 0.01 uF 1000.0uF 0.1 1F 1 time/ sec. 10.000mF} 0.0071mF 0.1 times/ sec. 100.00mF 0.01mF 3%+10 0.01 times/ sec. Notes: 1. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 2. With film capacitor or better, use Relative mode to zero residual. 3. Maximum display counts for each range is 11000 counts O TEMPERATURE Thermal Type RANGE Resolution Accuracy K -200C ~ 1372C 0.1C 0.3% 43C -32B8F ~ 2502F 0.1F 9.3% +6F J -210C ~ 1200C 0.1C 0.3% +3C -346F ~ 2192F 0.1F 0.3% +6F Notes: 1. The accuracy does not include the tolerance of thermocouple probe, and the thermal sensor plugged into the meter should be putting on the place will be operating for 7 hour at least. 93fF] FREQUENCY Range Resolution Accuracy Min. Input Freq. 99. 999Hz 0.0071Hz 999. 99Hz 0.01Hz 9.9999kHz | 0.0001kHz 0.02%+3 1Hz 99.999k Hz] 0.001kHz 999,.99k Hz 0.01kHz <600kHz e Overload protection: 1000V; <20,000, 000VxHz Sensitivity for Voltage Measurement FREQUENCY SENSITIVITY AND TRIGGER LEVEL MINIMUM SENSITIVITY Trigger Level for DC INPUT RANGE {RMS SINEWAVE) coupling {Maximum input for _ specified accuracy = | 20 Hz-200 kHz caaaniial < 100 kHz tt 10 x Range or 1000V) 50 mV 10mV 25mV 10mV 25mV 500 mV 7OmV 150mV 70mV 150mV 1000mvV 120mV 300mvV 120mV 300mV 5V 0.3V 0.5V 0.6V 1.5V 50V 3V 5V 6V 15V 500V 30V< 100kHz No. Spec 60V No Spec. 1000V 50V <100kHz No. Spec 120V No Spec. The accuracy for duty cycle and pulse width is based a 5V square wave input to the DC 5V range. For AC coupling, the duty cycle range can be measured within 5%~95% as the signal frequency >20Hz. DUTY CYCLE: MODE RANGE Accuracy of Full Scale DC coupling 0.01%~99.99% 0.3% per kHz+0.3% PULSE WIDTH: RANGE Resolution Accuracy 500ms 0.01ms 0.2%+3 2000ms 0.1ms 0.2%+3 Notes: Positive or negative pulse width must be greater than 10us and the range of duty cycle should be considered. The range of pulse width is determined by the frequency of the signal. 94Sensitivity for Current Measurement Input Range Minimum sense Sine-wave) 500nA {OOWA 5000nA 250A 50mA {0mA 500mA 25mA 5A 1A 10A 2.5A Maximum input, please refer to AC Current measurement. 95O FREQUENCY COUNTER Divide 4 (secondary display - 1 ") Range | Resolution Accuracy Sensitivity Min. Input Freq. 99.999Hz | 0.001Hz 999.99Hz | 0.01Hz 100mV R.M.S. 9.9999kHz| 0.0001kHz| 0.002%+5 0.5Hz 99,.999k Hz} 0.001kHz 999.99k Hz| 0.01kHz 200mV R.M.S. 9.9999MHz! 0.0001 MHz <2MHz Divide 100 (secondary display -100) Range | Resolution Accuracy Sensitivity Min. Input Freq. 9.9999MHz| 0.0001 MHz 0.002%+5 300m V R.M.S IMHz 99.999MHz} 0.001 MHz <20MHz 500mV R.M.S Notes: 1. The maximum measuremeni levei is < 30Vpp. 2. The minimum measurement frequency of Low frequency is set by Power-ON option to speed up the measuring rate. 3. All frequency counters are susceptible to error when measuring low-voltage, low-frequency signals. Shielding inputs from external noise pickup is critical for minimizing measurement errors 4, The accuracy for duty cycle and pulse width is based a 5V square wave input without dividing signal. DUTY CYCLE: RANGE 0.01%~99,.99% Accuracy of Full Scale 0.3% per KHz+0.3% PULSE WIDTH: RANGE Resolution Accuracy 500ms 0.01ms 0.2%+3 2000ms 0.1ms 0.2%+3 Note: Positive or negative pulse width must be greater than 70ys and the range of duty cycle should be considered. The range of pulse width is determined by the frequency of the signal. 96C] SQUARE WAVE OUTPUT OUTPUT Range Resolution Accuracy Frequency 0.5, 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 100, 120, 150, 200, 240, 300, 400, 480, 600, 800, 1200, 1600, 2400, 4800 Hz 0.07Hz 0.005 % +2 Duty cycle ni 0.39% ~ 99.60 % 0.390625% 0.4% of full scale na Pulse width ni | 1 / Frequency Range/256 0.2ms+ Range/256 Amplitude Fixed 0-+2.8V 0.1V 0.2V NOTE: 1. 97 The plus or minus pulse width must be greater than 50 ps for adjusting the duty cycle or pulse width under different frequency. Else, the accuracy and range will be different to definition. Output impedance: 3.5kQ maximum, For signal frequency greater than 1 kHz, additional 0.1% per kHz to be added to accuracy.@ ELECTRICAL SPECIFICATIONSFOR MODEL 2880B Accuracy is given as +(% of reading + counts of least significant digit) at 23C + 5C, with relative humidity Less than 80% R.H. 1 DC mV! Voltage : Overload Range Resolution Accuracy Protection - 50mV 0.001mV 0.05% +50 *N2 1000V for the 500mV 0.04mV circuits <0.3A 1000mvV 0.imV 0.03% +5 short circuit. 5V 0.0001V 50V 0.001V 4000V 500V 0.01V 1000V 0.1V Notes: 3. input impedance: >1GQ for 50mV~1000mV ranges. For 5V~1000V ranges, 10MQ (nominal) for single display and parallel connected with1.1M& as dual display. 4. The accuracy could be 0.05%+5, always use relative function to zero thermal effect (short test leads) before measuring the signal. O AG mV/V (TRUE RMS: From 5% to 100% of ranqe) Range | Resolution Accuracy 30~45 Hz | 45-1k Hz | 1k-10k Hz .|10k~30k Hz 50mV 0.001mV 1%+60 0.6%+40 1.0%+40 1.6% +60 500mvV 0.01mV 1%t60 0.6%+25 1.0%+40 1.6%+60 7o00mV 0.imV 1%+60 0.6%+25 1.0%+25 1.6%+40 5V 0.0001V 1% +60 0.6%t25 1.0%+25 1.6% +40 50V 0.0041V 1%+60 0.6%+25 1.0%+25 1.6%+40 500V 0.01V 1%+60 0.6%+25 1.0%+25 1.6%+40 1000V 0.1V 1%+60 0.6%+40 1.0%+40 | No SPEC. Notes: 5. Overload Protection: 1000V R.M.S.; 1000V R.M.S. for the circuits <0.3A short circuit for mV ranges. 6. Input impedance: >1G for 50mV~1000mvV. 1.1MQ (nominal) in parallel with <100pF for 5V~1000V ranges 7. Input voltage is lower than 200Vrms. 8. Crest factor<=3 98CO) dB {decibel calculation) dB base Reference Default Reference imW (dBm) 1~9999n 6002 1V (dBV) 1V 1V Notes: 4. The reading of dBm is indicated in decibels of power above or below 1mW, or decibels of voltage above or below 1V. The formula is according to voliage measurement and specified reference impedance. Its accuracy is depended on the accuracy of voltage measurement, and an additional! calculation error of 0.3dB should be added. 5. Auto-ranging mode is used as selected decibel function. 6. The bandwidth is according to voltage measurement. fF] PEAK HOLD (Capturing changes) Signal width Accuracy for DC mV/ Voltage/ Current Single event >ims 2%+400 for all ranges Repetitive >250us 2%+1000 for all ranges 99FDC CURRENT : Burden Voltage Overload Range |Resolution Accuracy / Shunt g Protection 500nA | 0.01pA 0.1% +5 na 0.06V (1000) 440mA 5000nA | 0.1p1A 0.1% +5 +n 0.6V (1000) 10x38mm 50mA | 0.001mA 0.2% +5 +n 0.09V (10) AC/DC 1000V 500mA | 0.01mA 0.2% +5 -n1 0.9V (10) 30kA/ fast-acting 5A 0.0007A 0.2% +10 0.2V (0.019) 11A 10A -n2 | 0.0001A 0.2% +10 0.4V (0.010) Notes: 3. Always use relative function to zero thermal effect with open test lead before measuring the signal. If not use Relation function, additional 20 digits to the accuracy. The thermal effect could be occurred as follows: m@ Wrong operation to measure the high voltage of 50V~1000V for resistance, diode, and mV measurements. m After battery charging completed. @ After measuring the current greater than 500mA, it is suggested to cool down the meter for two times of measuring time you applied. 4. 10A continuous, and the additional of 0.5% to specified accuracy as measure the signal greater than 10A~20A for 30 seconds maximum. After measured current for > 710A, to cool dawn the meter for two times of measuring time you applied before low current measurement. O AG CURRENT (TRUE RMS: From 5% to 100% of range} _ Range Resolution Accuracy fo -. 30~45 Hz 45~2k Hz 2k~20k Hz 5OOuANa 0.011 1.5% +50 0.8% +20 3% +80 5000nA 0.7nA 1.5% +40 0.8% +20 3% +60 50mA 0.001mA 1.5% +40 0.8% +20 3% +60 500mA 0.01mA 1.5% +40 0.8% +20 3% +60 BA 0.00014 2% +40-na 0.8% +20 3% +60 410A +n2 0.0001A 2% +40-na 0.8% 420 <3A/5kHz Note: 6. Overload protection: Fast-acting fuse 0.44A for < 500mA, and 11A for BANDA. 7. 710A continuous, and the additional of 0.5% to specified accuracy as measure the signal greater than 10A~20A for 30 seconds maximum. After measuring > 10A, to cool down the meter for two times of measuring time you applied before low current measurement. 8. Input current < 3Arms 9. Input current >35uArms 10, Crest factor<=3 100DOLRESISTANCE Range | Resolution Accuracy Test current Overload Protection 500Q :na 0.010 0.08% +10 1.0mA 5kQ -na_ | 0,0001kO 0.38mA 50kO 0.001k2 0.08% +5 38unA {o00V 500k 0.01kO 3.8nA R.M.S. 5MQ | 0.0001MQ 0.2%+5 345nA *N1 5O0MQ na | 0.001MQ 1% +5 200nA 500nS-as | O.01nS 1%+10 200nA Notes: 1. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 2. Maximum open voltage: <+4.8V 3. The accuracy of 5009 and 5kQ is specified after Relative function, which is used to substrate the test lead resistance and the thermal effect. 4. For the range of 50M, the RH is specified for < 60%. 5. The accuracy is specified for <50nS and after Relative function as open test lead. 6. Instant Continuity: Buiit-in buzzer sounds when resistance is less than 10.00 O DIODE CHECK/ AUDIBLE CONTINUITY Range]. Resolution Accuracy Test Current__| Open Voltage | Diode 0.1 mV 0.05% +5 Approx. 1.0mMA | <+4,8V DC Notes: 3. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 4. Built-in buzzer sounds when reading is below 50 mV approx. 1040 CAPACITANCE Range Resolution Accuracy Measuring rate as full scale 10.000nF 0.001nF 1%+8 100.00nF 0.01nF 1000.0nF 0.1nF 1%t5 4 times/ sec. 10.000pF 0.004 nF 400.00UF 0.01 nF 1000.0uF 0.1 pF 1 times/ sec, 10.0GO0mF| 0.001mF 0.7 times/ sec. 100.00mF 0.01mF 3%+10 0.07 times/ sec. Notes: 4. Overload protection: 1000V R.M.S. for the circuits <0.3A short circuit. 5. With film capacitor or better, use Relative mode to zero residual. 6. Maximum display counts for each range is 11000 counts C) TEMPERATURE (requires optional adapter) Thermal Type RANGE +2 | Resolution Accuracy K -200C ~ 1372C 0.1C 0.3% +3C -328F ~ 2502F 0.1F 0.3% +6F Notes: 2. The accuracy does not include the tolerance of thermocouple probe, and the thermal sensor plugged into the meter should be putting on the place will be operating for 1 hour at least. 102[1] FREQUENCY Range =| Resolution Accuracy Min. Input Freg. 99.999Hz 0.001Hz 999.99Hz 0.071Hz 9.9999kHz | 0.0001kHz 0.02%+3 1Hz 99,999k Hz | 0.001kHz 999.99k Hz 0.01kHz <600kHz * Overload protection: 1000V; <20,000,000VxHz Sensitivity for Voltage Measurement FREQUENCY SENSITIVITY AND TRIGGER LEVEL MINIMUM SENSITIVITY {Trigger Level for DC coupling INPUT RANGE (RMS SINEWAVE) }(Maximum input for _ . specified accuracy = |20 Hz-100 kHz O00 eke <= 100 kHz "300 ue 10 x Range or 1000V) 50 mV 10mV 15mV 10mV 15mV 500 mV 25mV a5mvV 6O0mvV 7OmV 1000mV 40mV 50mV 100mV 150mV 5V 0.25V 0.5V O.5V/ 1.25V<100Hz 0.6V 50V 2.5V BV 5V 6V 500V 25V No. Spec 50V No Spec. 1000V 50V No. Spec 300V No Spec. The accuracy for duty cycle and pulse width is based a 5V square wave input to the DC 5V range. For AC coupling, the duty cycle range can be measured within 5%~95% as the signal frequency >20Hz. DUTY CYCLE: MODE RANGE Accuracy of Full Scale DC coupling 0.01%~99.99% 0.3% per kHz+0.3% PULSE WIDTH: RANGE Resolution Accuracy 500ms 0.01ms 0.2%+3 2000ms 0.4ms 0.2%+3 Positive or negative pulse width must be greater than 10ps8 and the range of duly cycle should be considered. The range of pulse width is determined by the frequency of the signal. Sensitivity for Current Measurement Minimum Sensitivity (RMS Sine-wave) input Range 20Hz~20kHz 500uA 1O0RA 5O00LA 250nA 50mA 10mA 500mA 25mA 5A 1A 10A 2.58 e Maximum input, please refer to AC Current measurement. Important: Specifications and information is subject to change without notice. For the POBt current product information please visit www.bkprecision.comMAINTENANCE. m SERVICE Z\ WARNING To avoid electrical shock, do not perform any service unless you are qualified to do so. ATLA Houde SSB If the instrument fails to operate, check battery and test leads, and replaces them if necessary. If the instrument still cant work, double check operating procedure as described in this instruction manual. When servicing, use specified replacement parts only. Following table will guide you to identify basic problems: Malfunction Identification No LCD indication as power ON by rotary switch Check battery and charge or replace battery. No beeper tone Check setup mode whether the beeper has been set to OFF. Then select the driving frequency you want Failed on current measuring Check Fuse No charging indication Check external adaptor whether the output is DC 24V and plug into the charging terminals completely. Line power voltage (100V~250V AC 47Hz~ 63Hz) and power cord Failed on Remote control The optical side of cable connected to meter, the text side of cover should be up. Check the baud rate, parity, Data bit, Stop bit (default is $600, n, 8, 1) Driver install for USB- RS232. 104mM BATTERY REPLACEMENT (unit does not come with a Ni-MH battery) Z\ WARNING a ONLY NICKEL-METAL HYDRIDE (<> BATTERY CAN BE CHARGED, ALL Ni-MH BATTERIES MUST BE RECYCLED OR DISPOSED OF PROPERLY. Remove all test leads and external adaptor before = a The meter is powered by 9 V battery, be sure fo used specified battery. To ensure the specification specified, it is suggested to replace battery immediately as the sign of 44] low battery is displayed and flashing. If your meter has specified rechargeable battery inside, please go to how to charge battery. Following procedures for battery replacement: 1. Remove protective Holster. 1052. on Turn the screw on the battery cover form LOCK ta OPEN position by counterclockwise. Slide pull down the battery cover. See below figure: Ct SS Then take up the cover. = _\ Replace the specified battery. Reverse the procedure of opening cover to close the bottom cover. 106B HOWTO CHARGE BATTERY (optional accessory required) Z\ WARNING Never discharge the battery by short battery or reverse polarity in any subjects. Always check whether the battery is rechargeable battery before charging battery. Never rotate the rotary switch under charging as DC 24V has been applied to charging terminals. The meter c can n be powered by a Vv NiMH rechargeable battery. Yo You must use the specified optional accessory 24V DC adaptor to charge a rechargeable battery. IMPORTANT: Never rotate the rotary switch as the DC 24V has been applied to the charging terminals. Use the following procedures to charge the patiery: 1. Remove and disconnect the test leads from meter. 2. Turn rotary switch to the 2: position. Plug power cord to DC adapter. 3. Plug the Red (+) banana terminal of DC adapter to & and the Black {-) banana terminal of DC adapter to [COM] terminals, respectively. The DC adaptor can be replaced by a DC power supply, to set DC24V output and over current limitation set to <0.5A. Be sure the polarity. See the below figure: Figure- 65 Charge battery 1074. The primary display will indicate existing battery level, and the "SBY is flashing on second display and short tone sounds to remind you whether to charge battery or not. If you want to charge battery, just one touch by pushing ===" button to start charging procedures. It is suggested never charge the battery as the battery voltage is over 9.0V. Condition Battery Voltage Proportional Percentage Trickle 6V~10.0V 0%~100% Under charging 8.4~11.4V 0%~100% 0 ELS phe Bn tm Figure- 66 Battery capacity display as trickle 1085. The meter wiil do self-test to check whether inside battery ts rechargeabie or not. The self-test will take 2~3 minutes, no pushbuttons can be operated in this period. If something wrong, the error message will be indicated as following: segments | SE Lh F kL | 109 displayed cycling to i up present the fF --~]. 0 ee rm Vv battery is : - iat under | 100 charged and | +) rh a testing. Figure- 67 Self-test . Error Condition =|." Secondary Display 2 OL 1. No battery inside 2. Failed battery 3. Battery is full C-Err 1. Non rechargeable battery inside 2. Failed battery *e. Figure- 68 Error message if such error message occurred, check whether the battery is specified one. We have done best recognition as possible as we can to prevent wrong battery to be charged. Maybe some baiteries from different manufactures have bad quality. Please make sure the battery is specified rechargeable battery before starting charge function again. Once the specified rechargeable battery has been used, press (SH,button to do self test again. If the C-Err still occurred, replace with a new battery. 6. The smart charging mode will be started if passed self-test. The charge time is limited within 135 minutes. That means the battery will not be charged over 135 minutes. The secondary display will count down the charging time. You can expect when the battery will be fully charged. During charging period, no pushbuttons can be operated. The error message maybe indicated during charge period to prevent overcharging on the battery. eyo Maximum : eee (3 om charging Three time: 135 segments | minutes displayed | ci mens - cyclingto x. ae present 7 inte _ the battery | 0 : 5 ' ,) 00 isunder | + ii whee ee Peete et a charged. | ee Figure- 69 Charging mode 7. The charge end message (C-End)} will be indicated on secondary display as the charging cycle has been finished. The trickle charging current still be provided to keep the battery capacity. The signs of n and L will be cycling display to present the trickle state. re ( Trickle Enc charging is = used to keep the battery co ie y capacity. vam Sete Figure- 70 Charge end and Trickle state 8. Usually, the battery has been fully charged. If you feel the battery life as worst as you can't acceptable. Please replace a new rechargeable battery. 9. Remove the DC adapter when the C-End is indicated on secondary display. Dont turn the rotary switch before removed the adapter from terminals. 410| ef a: Errar-Futl Bote eet Esror-Empty a | ql be charged Battery can | i Er " ee ee Poole, 1 00 Ht Hint BI ae V _. oe 9 ee ma tan ee Rocce Tra @ Fully Charged tl iL ue = - Vv os Lic Qo A oo Figure- 71 Battery charging procedures 411m FUSE REPLACEMENT ore oon (0 00 Use the following procedures to replace the fuses of the meter: Use the rotary switch to turn the meter off, and disconnect the test leads from external equipment. Be sure the adaptor has been removed. Remove the cover of battery compartment as Fuse replacement. Loosen 3 screws on bottom case, pull up and remove the cover. Lift the circuit board as shown in following figure. Remove the defective fuse by gently prying one end of the fuse loose and sliding the fuse out of the fuse bracket. Install a new fuse of the same size and rating. Make sure the new fuse is centered in the fuse holder. Ensure that the rotary switch on the top case and circuit board switch stay on the OFF position. Then re-fasten the circuit board and the bottom caver respectively. The rate, position and size for fuses see the below table. POSITION RATING SIZE Type Fuse 440mA/1000V 10x38 Fast blow Fuse? 11A/1000V 10x38 Fuse OQ FUSE1 Q FUSE2 Gye Figure- 72 Fuse replacement 112B CLEANING Z\ WARNING To avoid electrical shock or damage to the meter, do not get water inside the case. To clean the instrument, use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner directly onto the instrument, since it may leak into the cabinet and cause damage. Do not use chemicals containing benzine, benzene, toluene, xylene, acetone or similar solvents to clean the instrument. After cleaning, make sure the instrument is dried completely before using. 113BK PRECISION wit Ji Service Information Warranty Service: Please return the product in the original packaging with proof of purchase to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Non-Warranty Service: Return the product in the original packaging to the address below. Clearly state in writing the perfarmance problem and return any leads, probes, connectors and accessories that you are using with the device. Customers not on open account must include payment in the form of a money order or credit card. For the most current repair charges please visit www.bkprecision.com and click on servicefrepair. Return all merchandise to BAK Precision Corp. with pre-paid shipping. The flat-rate repair charge for Non-Warranty Service does not include return shipping. Return shipping te locations in North American is included for Warranty Service, For overnight shipments and non-North American shipping fees please contact B&K Precision Corp. B&K Precision Corp. 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.cam 714-921-9095 include with the returned instrument your complete return shipping address, contact namie, phone number and description of problem. Limited Three-Year Warranty B&kK Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free fram defects in workmanship and materials for a period of three years from date of purchase. 5&K Precision Corp. will, without charge, repair or replace, at its option, defective product ar component parts. Retumed product must be accompanied by proof of the purchase date in the form of a sales receipt. To obtain warranty coverage in the U.S.A., this product must be registered by completing a warranty registration form on www.bkprecision.com within fifteen (15) days of purchase, Exclusions: This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs, The warranty is void if the serial number is altered, defaced or removed. B&K Precision Corp, shall not be liable for any consequential damages, including without limitation damages resuiting from loss of use. Some states do not allow limitations of incidental or consequential damages. So the above limitation or exclusion may not apply to you. This warranty gives you specific rights and you may have other rights, which vary fram state-to-state. B&k Precision Carp. 22820 Savi Ranch Parkway Yorba Linda, CA 92B87 www.bkprecision.com 714-921-9095 114PN: 481-549-9-001 Printed in Taiwan 2006 B&K Precision Corp. 22820 Savi Ranch Parkway Yorba Linda, CA 92887 USA TEL: 714-921-9095 FAX: 714-921-6422 www.bkprecision.com