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Users Manual

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AM-140-A

AM-160-A

Precision DMM with TRMS &

PC Connection

AM-140-A

AM-160-A

Precision DMM with TRMS & PC Connection

Users Manual

May 2010, Rev.1

English

Limited Warranty and Limitation of Liability

Your Amprobe product will be free from defects in material and workmanship for 1

year from the date of purchase. This warranty does not cover fuses, disposable batteries

or damage from accident, neglect, misuse, alteration, contamination, or abnormal

conditions of operation or handling. Resellers are not authorized to extend any other

warranty on Amprobe’s behalf. To obtain service during the warranty period, return the

product with proof of purchase to an authorized Amprobe Test Tools Service Center or

to an Amprobe dealer or distributor. See Repair Section for details. THIS WARRANTY

IS YOUR ONLY REMEDY. ALL OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED OR

STAUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE

OR MERCHANTABILITY, ARE HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE

FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,

ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the

exclusion or limitation of an implied warranty or of incidental or consequential damages,

this limitation of liability may not apply to you.

Repair

All test tools returned for warranty or non-warranty repair or for calibration should be

accompanied by the following: your name, company’s name, address, telephone number,

and proof of purchase. Additionally, please include a brief description of the problem or

the service requested and include the test leads with the meter. Non-warranty repair or

replacement charges should be remitted in the form of a check, a money order, credit

card with expiration date, or a purchase order made payable to Amprobe® Test Tools.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty statement and check your battery before requesting repair.

During the warranty period any defective test tool can be returned to your Amprobe®

Test Tools distributor for an exchange for the same or like product. Please check the

“Where to Buy” section on www.amprobe.com for a list of distributors near you.

Additionally, in the United States and Canada In-Warranty repair and replacement units

can also be sent to a Amprobe® Test Tools Service Center (see next page for address).

Non-Warranty Repairs and Replacement – US and Canada

Non-warranty repairs in the United States and Canada should be sent to a Amprobe® Test

Tools Service Center. Call Amprobe® Test Tools or inquire at your point of purchase for

current repair and replacement rates.

In USA In Canada

Amprobe Test Tools Amprobe Test Tools

Everett, WA 98203 Mississauga, ON L4Z 1X9

Tel: 888-993-5853 Tel: 905-890-7600

Fax: 425-446-6390 Fax: 905-890-6866

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your Amprobe® Test Tools distributor

for a nominal charge. Please check the “Where to Buy” section on www.amprobe.com for

a list of distributors near you.

Amprobe® Test Tools Europe

In den Engematten 14

79286 Glottertal, Germany

tel: +49 (0) 7684 8009 - 0

*(Correspondence only – no repair or replacement available from this address. European

customers please contact your distributor.)customers please contact your distributor.)

AM-140-A / AM-160-A Precision DMM with TRMS & PC Connection

1 5-4/5 digits 500000 counts LCD display

2 Push-buttons for special functions & features

3 Selector to turn the Power On or Off and select a function

4 Input Jack for 10A (+) (20A for 30sec) current, and for T2 (-) function

5 Input Jack (+) for all functions EXCEPT current (µA, mA, A) and

T2 functions

6 Common (Ground reference) Input Jack (-) for all functions EXCEPT

T2 function

7 Input Jack (+) for milli-amp, microamp, and T2 (+) functions

CONTENTS

SYMBOLS ...............................................................................................................1

UNPACKING AND INSPECTION .............................................................................3

FEATURES ...............................................................................................................3

OPERATION ............................................................................................................5

AC Voltage, DC Voltage, DC+AC Voltage, & Hz Line Level Frequency ....5

Hz Logic Level Frequency and % Duty Cycle functions .............................7

T1-T2 Dual Channels Temperature function (AM-160-A only) ......................8

 Resistance, Continuity functions ............................................................9

Capacitance, Diode test function .....................................................9

µA, mA, A, and %4-20mA Current functions .................................................10

PC-COMM computer interface capabilities .....................................................11

MAX/MIN RECORDING mode ...........................................................................12

CREST Capture (Instantaneous Peak Hold) mode ..........................................12

Relative Zero mode ......................................................................................12

500000 high resolution stable mode ...............................................................12

Backlighted display ...........................................................................................12

Manual or Auto-ranging ..................................................................................13

Hold ...............................................................................................................13

Set Beeper Off ...................................................................................................13

Beep-Jack™ Input Warning ..............................................................................13

Intelligent Auto Power Off (APO) ....................................................................13

Disabling Auto Power Off ................................................................................13

SPECIFICATION .......................................................................................................14

MAINTENANCE AND REPAIR ................................................................................21

Trouble shooting ...............................................................................................22

Cleaning and Storage .......................................................................................22

Battery and Fuse replacement .........................................................................22

SYMBOLS

Caution ! Risk of electric shock

Caution ! Refer to the explanation in this Manual

Double Insulation or Reinforced insulation

Alternating Current (AC).

Direct Current (DC).

Fuse

Earth (Ground)

Please remove all the test leads before preforming maintenance,

cleaning, battery replacement, fuse replacement, etc

Complies with European Directives

Conforms to relevant Australian standards

Do not dispose of this product as unsorted municipal waste.

Contact a qualified recycler for disposal

Safety Information

This manual contains information and warnings that must be followed for

operating the instrument safely and maintaining the instrument in a safe

operating condition. If the instrument is used in a manner not speciﬁed by the

manufacturer, the protection provided by the instrument may be impaired.

The meter is intended only for indoor use.

The meter protection rating, against the users, is double insulation per

IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed. and CAN/CSA C22.2

No. 61010.1-0.92 to Category III 1000 Volts AC & DC and Category IV 600 Volts

AC & DC.

AM-140-A Terminals (to COM) measurement category:

V : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC & DC.

A / mAµA : Category III and Category IV 600 Volts AC and 300 Volts DC.

AM-160-A Terminals (to COM) measurement category:

V / A / mAµA : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC

& DC.

Per IEC61010-1 2nd Ed. (2001) Measurement Category

Measurement Category IV (CAT IV) is for measurements performed at the

source of the low-voltage installation. Examples are electricity meters and

measurements on primary overcurrent protection devices and ripple control

units.

Measurement Category III (CAT III) is for measurements performed in the

building installation. Examples are measurements on distribution boards,

circuit- breakers, wiring, including cables, bus-bars, junction boxes, switches,

socket-outlets in the ﬁxed installation, and equipment for industrial use

and some other equipment, for example, stationary motors with permanent

connection to the ﬁxed installation.

Measurement Category II (CAT II) is for measurements performed on circuits

directly connected to the low voltage installation. Examples are measurements

on household appliances, portable tools and similar equipment.

Terms In This Manual

WARNING - identiﬁes conditions and actions that could result in

serious injury or even death to the user.

CAUTION - identiﬁes conditions and actions that could cause damage

or malfunction in the instrument.

WARNING

To reduce the risk of ﬁre or electric shock, do not expose this product to

rain or moisture. To avoid electrical shock hazard, observe the proper

safety precautions when working with voltages above 60 VDC or 30 VAC

rms. These voltage levels pose a potential shock hazard to the user. Do

not touch test lead tips or the circuit being tested while power is applied

to the circuit being measured. Keep your ﬁngers behind the ﬁnger guards

of the test leads during measurement. Inspect test leads, connectors,

and probes for damaged insulation or exposed metal before using the

instrument. If any defects are found, replace them immediately. Do not

measure any current that exceeds the current rating of the protection

fuse. Do not attempt a current measurement to any circuit where

the open circuit voltage is above the protection fuse voltage rating.

Suspected open circuit voltage should be checked with voltage functions.

Never attempt a voltage measurement with the test lead inserted into

the µA/mA or A input jack. Only replace the blown fuse with the proper

rating as speciﬁed in this manual. Only use the accompanied test leads, or

replace with the same rating or better.

CAUTION

Disconnect the test leads from the test points before changing functions.

Always set the instrument to the highest range and work downward for

an unknown value when using manual ranging mode.

CENELEC Directives

The instruments conform to CENELEC Low-voltage directive 2006/95/EC and

Electromagnetic compatibility directive 2004/108/EC

UNPACKING AND INSPECTION

Your shipping carton should include:

1 AM-140-A or AM-160-A Meter

1 Test Leads (Black x 1; Red x 1)

1 K Type thermal couple with banana plug (For AM-160-A only)

1 Users Manual

1 Single Alkaline 9V battery; NEDA1604A, JIS6AM6 OR IEC6LF22(Installed)

If any of the items are damaged or missing, return the complete package to

the place of purchase for an exchange.

FEATURES

Average sensing RMS calibrated

RMS (Root-Mean-Square) is the term used to describe the effective or equivalent

DC value of an AC signal. Most digital multimeters use average sensing RMS

calibrated technique to measure RMS values of AC signals. This technique is to

obtain the average value by rectifying and ﬁltering the AC signal. The average

value is then scaled upward (calibrated) to read the RMS value of a sine wave. In

measuring pure sinusoidal waveform, this technique is fast, accurate, and cost

effective. In measuring non-sinusoidal waveforms, however, signiﬁcant errors

can be introduced because of different scaling factors relating average to RMS

values.

AC True RMS

AC True RMS, normally refers as True RMS, identiﬁes a DMM function that is

AC coupled, and responds accurately only to the effective RMS AC component

value regardless of the waveforms. However, DC component plays an important

role in the distorted non-symmetrical waveforms, and will also be of interest

sometimes. A full wave rectiﬁed sine waveform is a good example, and the AC

true RMS function will only give the AC component reading which is at 43.6%

of the total effective DC+AC RMS reading.

DC+AC True RMS

DC+AC True RMS calculates both of the AC and DC components given by the

expression when making measurement, and can responds

accurately to the total effective RMS value regardless of the waveform. Distorted

waveforms with the presence of DC components and harmonics may cause:

• Overheated transformers, generators and motors to burn out faster than

normal

• Circuit breakers to trip prematurely

• Fuses to blow

• Neutrals to overheat due to the triplen harmonics present on the neutral

• Bus bars and electrical panels to vibrate

AC Bandwidth

AC bandwidth of a DMM is the range of frequencies over which AC measurements

can be made within the speciﬁed accuracy. It is not the frequency measurement

function, and is the frequency response of the AC functions. A DMM cannot

accurately measure the AC value with frequency spectrums beyond the AC

bandwidth of the DMM. Therefore, wide AC bandwidth plays an important role

in high performance DMMs.In reality, complex waveforms, noise and distorted

waveforms contain much higher frequency spectrum than its fundamental.

NMRR (Normal Mode Rejection Ratio)

NMRR is the DMM’s ability to reject unwanted AC noise effect that can cause

inaccurate DC measurements. NMRR is typically speciﬁed in terms of dB

(decibel). This series has a NMRR speciﬁcation of > 60dB at 50 and 60Hz, which

is a good and deﬁnite ability to reject the effect of AC noise when making DC

measurements.

CMRR (Common Mode Rejection Ratio)

Common mode voltage is voltage present on both the COM and VOLTAGE input

terminals of a DMM, with respect to ground. CMRR is the DMM’s ability to reject

common mode voltage effect that can cause digit rolling or offset in voltage

measurements. This series has a CMRR speciﬁcations of > 80dB at DC to 60Hz in

ACV function; and > 120dB at DC, 50 and 60Hz in DCV function. If neither NMRR

nor CMRR speciﬁcation is speciﬁed, a DMM’s performance will be uncertain.

Analog bar-graph

The analog bar graph provides a visual indication of measurement like a

traditional analog meter needle. It is excellent in detecting faulty contacts,

identifying potentiometer clicks, and indicating signal spikes during

adjustments. Analog bar-graph is not available in AC+DC True RMS Voltage &

Current modes.

OPERATION

CAUTION

Before and after hazardous voltage measurements, test the voltage

function on a known source such as line voltage to determine proper

meter functioning.

AC Voltage, DC Voltage, DC+AC Voltage, & Hz Line Level Frequency

In AC Voltage, press SELECT button momentarily to toggle between AC and

dBm. In DC Voltage, press SELECT button momentarily to toggle between DC,

and DC+AC. In mV Voltage, press SELECT button momentarily to select DC,

AC, or DC+AC. The new settings will be saved automatically to the nonvolatile

memory as power up default. In DCV and DCmV, press 500000 button

momentarily to toggle between 4-4/5 digits and 5-4/5 digits readings. In

voltage or current functions, press the Hz push button momentarily to activate

or to exit Line Level Frequency measuring function. Line Level Frequency

measuring function is designed especially for noisy electrical high voltage

signals.

Note: In dBm function, power up default reference impedance will be

displayed for 1 second before displaying the dBm readings. Press dBm-

(RANGE) button momentary to select different reference impedance of 4, 8,

16, 32, 50, 75, 93, 110, 125, 135, 150, 200, 250, 300, 500, 600, 800, 900, 1000, up

to 1200. The new impedance value will be saved automatically to the non-

volatile memory as power up default.

Note: Line Level Frequency measuring function input sensitivity varies

automatically with voltage (or current) function range selected. The lower

the measuring range the higher the sensitivity. That is, mV function has the

highest and the 1000V range has the lowest as in voltage function ranges.

It is recommended to ﬁrst measure the signal voltage (or current) level then

activate the Hz function in that voltage (or current) range to automatically

get the most appropriate trigger level. When activated from voltage function,

you can also press the RANGE button momentarily to select another trigger

level range manually. The analog bargraph pointer will point at the selected

trigger level range scale 1, 2, 3, or 4. If the Hz reading is unstable, select lower

sensitivity to avoid electrical noise. If the reading shows zero, select higher

sensitivity.

Hz Logic Level Frequency and % Duty Cycle functions

Press SELECT button momentarily to toggle between Hz and % (duty cycle)

readings. The new setting will be saved automatically to the non-volatile

memory as power up default. Press 500000 button momentarily to toggle

between 5 full digits and 6 full digits Hz readings.

Note: Unlike the Line Level Frequency measuring function as previously stated,

this Logic Level Frequency function is set only at the highest input sensitivity

for measuring digital type electronic signals.

T1-T2 Dual Channels Temperature function (AM-160-A only)

Press SELECT button momentarily to toggle between °C and °F readings, and

the new setting will be saved automatically in the non-volatile memory as

power up default. Press T1-T2 (RANGE) button momentarily to select T1, T2, or

T1-T2 readings.

Note: Insert the banana plug K-type temperature bead probe with correct

polarities. Dual channels T1-T2 readings require 2 probes. You can also use a

plug adapter (Optional purchase) with banana pins to K-type socket to adapt

other standard K type mini plug temperature probes.

 Resistance, Continuity functions

Press SELECT button momentarily to toggle between  and Continuity

functions. The new setting will be saved automatically to the non-volatile

memory as power up default. Continuity function is convenient for checking

wiring connections and operation of switches. A continuous beep tone

indicates a complete wire.

CAUTION

Using resistance or continuity function in a live circuit will produce

false results and may damage the meter. In many cases the suspected

component must be disconnected from the circuit to obtain an accurate

reading.

Capacitance, Diode test function

Press SELECT button momentarily to toggle between Capacitance and

Diode test functions. The new setting will be saved automatically to the non-

volatile memory as power up default.

CAUTION

Discharge capacitors before making any measurement. Large value

capacitors should be discharged through an appropriate resistance load.

Note: Normal forward voltage drop (forward biased) for a good silicon diode

is between 0.400V to 0.900V. A reading higher than that indicates a leaky

diode (defective). A zero reading indicates a shorted diode (defective). An OL

indicates an open diode (defective). Reverse the test leads connections (reverse

biased) across the diode. The digital display shows OL if the diode is good. Any

other readings indicate the diode is resistive or shorted (defective).

µA, mA, A, and %4-20mA Current functions

Insert the red test lead into the correct µA/mA or A input jack. Press SELECT

button momentarily to select DC, AC, or DC+AC. The new settings will be

saved automatically to the non-volatile memory as power up default. In DC

mA function, neither in AC nor in DC+AC, press and hold the %4-20mA (

Hz) button for 1 second or more to display the current digital data in terms of

loop current percentage (%) value. It is set at 4mA = 0% (zero) and 20mA =

100% (span) with 0.01% high resolution, which virtually extends the meters’

capability to test and regulate the externally powered loop current in the

industrial process control applications. The analog bar-graph remains showing

the mA current value to alert the user.

Warning

When measuring a 3-phase system, special attention should be taken to

the phase-to-phase voltage that is signiﬁcantly higher than the phase-

to-earth voltage. To avoid exceeding the voltage rating of the protection

fuse(s) accidentally, always consider the phase-to-phase voltage as the

working voltage for the protection fuse(s).

PC-COMM computer interface capabilities

The instrument equips with an optical isolated interface port at the meter

back for data communication. Optional purchase PC interface kit USB-KIT3

is required to connect the meter to the PC computer. The USB-KIT3 Data

Recording System software equips with a digital meter, an analog meter,

a comparator meter, and a Data Graphical recorder display. Refer to the

README ﬁle in the interface kit for further details.

MAX/MIN RECORDING mode

Press REC button momentarily to activate MAX/MIN recording mode. The

LCD annunciators “R” and “MAX MIN” turn on. The meter beeps when new

maximum or minimum reading is updated. Press the button momentarily

to read throughout the Maximum (MAX), Minimum (MIN), and Maximum

minus Minimum (MAX-MIN) readings. Press the button for 1 second or more

to exit MAX/MIN recording mode. Auto Power Off feature will be disabled

automatically in this mode.

CREST Capture (Instantaneous Peak Hold) mode

Press CREST button momentarily to activate CREST mode to capture voltage

or current signal duration as short as 0.8ms. This mode is available in DC, AC,

DC+AC modes of voltage and current functions. The LCD annunciators “C” &

“MAX” turn on. The meter beeps when new maximum or minimum reading

is updated. Press the button momentarily to read throughout the Maximum

(MAX), Minimum (MIN), and Maximum minus Minimum (MAX-MIN) readings.

Press the button for 1 second or more to exit CREST capture mode. Auto Power

Off feature will be disabled automatically in this mode.

Relative Zero mode

Relative Zero allows the user to offset the meter consecutive measurements

with the displaying reading as the reference value. Practically MAX/MIN

recording feature readings can also be set as relative reference value. Press the

button momentarily to activate and to exit Relative Zero mode.

500000 high resolution stable mode

In DC voltage and frequency functions, press the 500000 button momentarily

to toggle between the 4-4/5 digits fast mode and the 5-4/5 digits high

resolution stable mode.

Backlighted display

Press the SELECT button for 1 second or more to turn on or off the display

backlight function. It will also be turned off automatically after 30 seconds to

extend battery life.

Manual or Auto-ranging

Press the RANGE button momentarily to select manual-ranging mode, and the

meter will remain in the range it was in, the LCD annunciator turns off.

Press the button momentarily again to step through the ranges. Press and hold

the button for 1 second or more to resume auto-ranging mode.

Note: Manual ranging mode feature is not available in Hz function.

Hold

The hold function freezes the display for later view. Press the HOLD button

momentarily to activate or to exit the hold function.

Set Beeper Off

Press the Hz button while turning the meter on to disable the push button

operating beeper feature. However, the continuity and Jack Beep input

warning features remain.

Beep-Jack™ Input Warning

The meter beeps as well as displays “InErr” to warn the user against possible

damage to the meter due to improper connections to the µA, mA, or A input

jacks when other function (like voltage function) is selected.

Intelligent Auto Power Off (APO)

The Intelligent Auto Power Off (APO) mode turns the meter off automatically

to extend battery life after approximately 17 minutes of no activities. Activities

are speciﬁed as: 1) Rotary switch or push button operations, and 2) Signiﬁcant

measuring readings of above 10% of range or non-OL  readings. In other

words, the meter will intelligently avoid entering the APO mode when it

is under normal measurements. To wake up the meter from APO, press the

RECORD button momentarily or turn the rotary switch to the OFF position and

then turn back on again. Always turn the rotary switch to the OFF position

when the meter is not in use.

Disabling Auto Power Off

Press the RANGE button while turning the meter on to disable the Auto Power

Off (APO) feature.

SPECIFICATIONS

General Specications

Display: 4-4/5 digits 50,000 counts. Selectable stable

mode 5-4/5 digits 500,000 counts for DC

voltage,& 6 digits 999,999 counts for HZ

Polarity: Automatic

Update rate:

4-4/5 digits fast mode:5 per second nominal;

5-4/5 digits stable mode:1.25 Per second

nominal;

42 Segments bar graph: 60 per second max

Operating temperature: 0°C to 45°C (32°F to 113°F)

Relative humidity: Maximum relative humidity 80% for

temperature up to 31°C decreasing linearly to

50% relative humidity at 45°C

Pollution degree: 2

Storage temperature: -20°C to 60°C (-4°F to 140°F), < 80% R.H.

(With battery removed)

Altitude: Operating below 2000m

Temperature coefcient: Nominal 0.1 X (speciﬁed accuracy)/ °C @ (0°C -

18°C or 28°C -- 40°C/32°F - 104°F), or otherwise

speciﬁed

Sensing: AC, AC+DC true RMS

Safety: Double insulation per iec61010-1 2nd ed.,

En61010-1 2nd ed., Ul61010-1 2nd ed. & Can/csa

c22.2 No. 61010.1-0.92 To category III 1000v AC

& DC and category IV 600V AC & DC

Am-140-a terminals (to COM) measurement category:

V : Category III 1000 VAC & VDC and category iv

600 VAC & VDC.

A / mAµA: Category III and category iv 600 VAC

and 300 VDC.

Am-160-a terminals (to COM) measurement category:

V / A / mAµA: Category III 1000 VAC & VDC and

category IV 600 VAC & VDC.

Overload protections:

Am-140-a:

µA & mA: 1A/600V, IR 10kA or better, F fuse

A: 10A/600V, IR 100kA or better, F fuse

V: 1050VRMS, 1450VPEAK

mV, , & others: 600 VDC & VAC RMS

Am-160-a:

µA & mA: 0.44A/1000V, IR 10kA or better, F fuse

A: 11A/1000V, IR 20kA or better, F fuse

V, mV, , & others: 1050VRMS, 1450VPEAK

Transient protection: 8kV (1.2/50µS SURGE)

E.M.C.: Meets en61326-1:2006 (EN55022, EN61000-3-

2, EN61000-3-3, EN61000- 4-2, EN61000-4-3,

EN61000-4-4, , EN61000-4-5, EN61000-4-6,

EN61000-4- 8, EN61000-4-11)

In an RF eld of 3V/m: Capacitance function is not speciﬁed

Other function ranges: Total accuracy = speciﬁed accuracy + 100 digits.

Performance above 3V/m is not speciﬁed

Power supply: Single alkaline 9V battery; neda1604a, jis6am6

or Iec6lf22

Power consumption: 6mA typical

Low battery: Below approx. 7V

Apo timing: Idle for 17 minutes

Apo consumption: 55µA typical for am-140-a; 30µA typical for am-

160-a

Dimension: L186mm x W87mm x H35.5mm (7.3in x 3.4in

x 1.4in); L198mm x W97mm x H55mm (7.8in x

3.8in x 2.2in) with holster

Weight: 390 gm (0.9lb); 500 gm (1.1lb) with holster

Electrical Specications

Accuracy is (% reading digits + number of digits) or otherwise speciﬁed, at

23°c 5°c & less than 75% relative humidity.

True rms voltage & current accuracies are speciﬁed from 5 % to 100 % of

range or otherwise speciﬁed. maximum crest factor < 5:1 at full scale & < 10:1

at half scale, and with frequency components within the speciﬁed frequency

bandwidth for non-sinusoidal waveforms.

DC Voltage

Range AM-160-A AM-140-A

Accuracy

500.00 MV, 5.0000V,

50.000V 0.02% + 2D 0.03% + 2D

500.00V 0.04%+2D 0.05% + 2D

1000.0V 0.05%+ 2D 0.1%+2D

NMRR: >60DB @ 50/60HZ

CMRR: >120DB @ DC, 50/60HZ, RS=1K

Input Impedance: 10M, 30pF nominal (80pF nominal for 500mV range)

Ohms

Range AM-160-A AM-140-A

Accuracy

500.000.07%+10D

0.1%+6D

5.0000K

0.07%+2D50.000K

500.00K

5.0000M0.2%+6D 0.4%+6D

50.000M2.0%+6D 2.0%+6D

Open Circuit Voltage: < 1.3VDC ( < 3VDC FOR 500 RANGE)

PAC & AC+DC Voltage

Range AM-160-A AM-140-A

Accuracy*

20HZ -- 45HZ

500.00MV, 5.0000V,

50.000V 1.5% + 60D UNSPEC’D

500.00V, 1000.0V UNSPEC’D

45HZ -- 300HZ

500.00MV 0.3% + 20D

0.8%+60D5.0000V, 50.000V 0.8% + 20D

500.00V,1000.0V 0.4% + 40D

300HZ -- 5KHZ 300HZ -- 1KHZ

500.00MV 0.3% + 10D 0.8%+40D

5.0000V , 50.000V ,

500.00V 0.4% + 40D 2.0%+60D

1000.0V 0.8% + 40D

(300HZ--1KHZ) 1.0%+40D

5KHZ -- 20KHZ 1KHZ -- 20KHZ

500.00MV 0.5%+20D 1DB**

5.0000V, 50.000V 0.8%+20D 2DB**

500.00V 0.5%+20D 3DB**

1000.0V UNSPEC'D UNSPEC'D

20KHZ -- 100KHZ

500.00MV 2.5%+40D

5.0000V, 50.000V 4.0%+40D**

500.00V UNSPEC'D

1000.0V

*from 5% to 10% of range: accuracy % of reading (or in db) + 80d

**from 5% to 10% of range: accuracy % of reading (or in db) + 180d

**from 10% to 15% of range: accuracy % of reading (or in db) + 100d

cmrr: >80db @ dc to 60hz, rs=1k

input impedance: 10m 30pf nominal (80pf nominal for 500mv range) residual

reading less than 50 digits with test leads shorted.

DBM: at 600, -11.76dbm to 54.25dbm

accuracy: 0.25db + 2d (@40hz -- 20khz)

input impedance: 10m, 30pf nominal

selectable reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125, 135, 150,

200, 250, 300, 500, 600,800, 900, 1000, 1200

AUDIBLE CONTINUITY TESTER

Audible threshold: between 20 and 200 response time < 100µS

Diode Tester

Range Accuracy Test Current

(Typical)

Open Circuit

Voltage

5.0000V 1%+1D 0.4mA < 3.5 VDC

Capacitance

Range Accuracy*

50.00nF 0.8% + 3D

500.0nF 0.8% + 3D

5.000µF 1.5% + 3D

50.00µF 2.5% + 3D

500.0µF** 3.5% + 5D

9999µF** 5.0% + 5D

*accuracies with ﬁlm capacitor or better

**in manual-ranging mode, measurements not speciﬁed below 45.0µF and

450µF for 500.0µF and 9999µF ranges respectively

DC Current

Range Accuracy Burden Voltage

500.00µA 0.15%+20D 0.15mV/µA

5000.0µA 0.1%+20D 0.15mV/µA

50.000mA 0.15%+20D 3.3mV/mA

500.00mA 0.1%+30D 3.3mV/mA

5.0000A 0.5%+20D 45mV/A

10.000A* 0.5%+20D 45mV/A

*10A continuous, >10A to 15A (TO 20A for AM-160-A) for 30 second max with

5 minutes cool down interval

AC & AC+DC Current

Range AM-160-A AM-140-A Burden Voltage

Accuracy

50HZ -- 60HZ

500.00µA

0.5%+50D 1.0%+40D

0.15mV/µA

5000.0µA 0.15mV/µA

50.000mA 3.3mV/mA

500.00mA 3.3mV/mA

5.0000A 45mV/A

10.000A* 45mV/A

40HZ – 1KHZ

500.00µA

0.7%+50D 1.0%+40D

0.15mV/µA

5000.0µA 0.15mV/µA

50.000mA 3.3mV/MA

500.00mA 3.3mV/MA

5.0000A 45mV/A

10.000A* 45mV/A

1KHZ – 10KHZ

500.00µA

2.0%+50D UNSPEC’D

0.15mV/µA

5000.0µA 0.15mV/µA

50.000mA 3.3mV/mA

500.00mA 3.3mV/mA

5.0000A

10.000A* UNSPEC'D UNSPEC'D 45mV/A

*10A continuous, >10A to 15A (to 20A FOR AM-160-A) for 30 second max with

5 minutes cool down interval

DC LOOP CURRENT %4--20MA

4mA = 0% (zero)

20mA = 100% (span)

Resolution: 0.01%

Accuracy: 25D

Crest mode (Instantaneous Peak Hold)

Accuracy: speciﬁed accuracy 100 digits for changes > 0.8ms in duration

T1-T2 Dual Temperature (AM-160-A only)

Range Accuracy

-50.0°C TO 1000.0°C 0.3%+1°C

-58.0°F TO 1832.0°F 0.3%+2°F

Thermocouple range & accuracy not included

Hz Line Level Frequency

Function Range Sensitivity

(Sine Rms)

Range

500mV 100mV 10HZ ~ 200KHZ

5V 1V 10HZ ~ 200KHZ

50V 10V 10HZ ~ 100KHZ

500V 100V 10HZ ~ 100KHZ

1000V 900V 10HZ ~ 10KHZ

Accuracy: 0.02%+4d

Hz Logic Level Frequency

Range Accuracy

5.0000HZ--2.00000MHZ 0.002%+4D

Sensitivity: 2.5VP square wave

%DUTY CYCLE

Range Accuracy

0.1% -- 99.99% 3D/KHZ+2D

Input frequency: 5HZ -- 500 KHZ, 5V logic family

MAINTENANCE AND REPAIR

WARNING

To avoid electrical shock, disconnect the meter from any circuit, remove

the test leads from the input jacks and turn OFF the meter before opening

the case. Do not operate with open case. Install only the same type of

fuse or equivalent

Calibration

Periodic calibration at intervals of one year is recommended to maintain meter

accuracy. Accuracy is speciﬁed for a period of one year after calibration.

If self-diagnostic message “rE-O” is being displayed while powering on, the

meter is re-organizing internal parameters. Do not switch off the meter then,

and it will be back to normal measurement shortly. However, if self-diagnostic

message “C_Er” is being displayed while powering on, some meter ranges

might be largely out of speciﬁcations. To avoid mis-leading measurements,

stop using the meter and send it for re-calibration. Refer to the LIMITED

WARRANTY section for obtaining warranty or repairing service.

Trouble Shooting

If the instrument fails to operate, check battery, fuses, leads, etc., and replace

as necessary. Double check operating procedure as described in this user’s

manual. If the instrument voltage-resistance input terminal has subjected to

high voltage transient (caused by lightning or switching surge to the system)

by accident or abnormal conditions of operation, the series fusible resistors will

be blown off (become high impedance) like fuses to protect the user and the

instrument. Most measuring functions through this terminal will then be open

circuit. The series fusible resistors and the spark gaps should then be replaced

by qualiﬁed technician. Refer to the LIMITED WARRANTY section for obtaining

warranty or repairing service.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use

abrasives or solvents. If the meter is not to be used for periods of longer than

60 days, remove the battery and store it separately.

Battery and Fuse Replacement

Battery use:

9V alkaline battery NEDA1604A, JIS6AM6 or IEC6LF22

AM-140-A

Fuse (FS1) for µAmA current input: 1A/600V, IR 10kA or better, F fuse;

Fuse (FS2) for A current input: 10A/600V, IR 100kA or better, F fuse

AM-160-A

Fuse (FS1) for µAmA current input: 0.44A/1000V, IR 10kA or better, F fuse

Fuse (FS2) for A current input: 11A/1000V, IR 20kA or better, F fuse

Battery replacement for models with battery access door:

Loosen the 2 screws from the battery access door of the case bottom. Lift the

battery access door and thus the battery compartment up. Replace the battery.

Re-fasten the screws.

Fuse replacement:

Loosen the 4 screws from the case bottom. Lift the end of the case bottom

nearest the input jacks until it unsnaps from the case top. Replace the blown

fuse(s) and/or the battery. Replace the case bottom, and ensure that all the

gaskets are properly seated and the two snaps on the case top (near the LCD

side) are engaged. Re-fasten the screws.