Technical Data
The Fluke 1621 is an easy-to-use earth ground tester.
The first line of defense in detecting reliable ground
connections, the unit features basic ground testing
methods including 3-pole Fall-of-Potential as well as
2-pole ground resistance. Its convenient size, rugged
holster, and large, clear LCD display make it an ideal
field earth tester, for most work environments. With
a simple user interface and intuitive functionality, the
Fluke 1621 is a handy tool for electrical contractors,
utility test engineers, and earth ground specialists.
Fluke 1621
Basic Earth Ground Tester
• 3-pole Fall-of-Potential earth testing for basic measurements
• 2-pole resistance measurements for added versatility
• Easily capture values with single-button operation
• Ensure accurate measurements with automatic ‘noise’ voltage detection
• Hazardous voltage warning offers increased user protection
• Clearly read and record data with a large, backlit display
• Rugged holster and design for tough work environments
• Portable size allows for easy transportation
• Instantly be alerted to measurements outside of your set limit, when
you use the adjustable limit setting
General specifications
Measuring functions 3-pole earth ground resistance, 2 pole ac resistance of a conductor,
Interference voltage
Intrinsic error Refers to the reference temperature range and is guaranteed for one year
Measuring rate 2 measurements/second
Battery One 9 volt alkaline (LR61)
Battery condition LO-BAT is displayed if voltage drops below 6.5 V
Voltages Between jacks H/C2 and E/C1: 250 Veff maximum (effective voltage)
Between jacks S/P2 and E/C1: 250 Veff maximum
Climatic class VDE/VDI 3540 RZ (conforming to KWG as per DIN 40040, 4/87)
Temperature performance Working: -10 °C to +50 °C (+14 °F to +122 °F)
Operating: 0 °C to +35 °C (+32 °F to +95 °F)
Storage: -20 °C to +60 °C (+68 °F to +140 °F)
Reference: +23 °C ± 2 °C (+73 °F ± 4 °F)
Note: If the tester is not going to be used, or is being stored for a long period, remove the battery and store separately from the tester to avoid
damage from battery leakage.
Note: The four temperature ranges for the tester exists to satisfy European Standards requirements; the instrument can be used over the full
working temperature range by using the temperature coefficient to calculate accuracy at the ambient temperature of use.
2 Fluke Corporation Fluke 1621 Basic Earth Ground Testter
General specifications cont.
Temperature coefficient ± 0.1 % of range per degree Kelvin
Safety IEC/EN 61010-1, 600 V CAT II, pollution degree 2
Dimensions 113 mm x 54 mm x 216 mm (4.5 in x 2.1 in x 8.5 in.), including holster
Weight 850 g (1.9 lb), including standard accessories, volume approximately 600 cm3
RE resistance measurement
Measuring method Current-voltage measurement with improved cross-talk attenuation,
no compensation of measuring lead resistance, with probe (3-pole)
or without probe (2-pole), as per IEC/EN 61557-5
Open circuit voltage 23 to 24 V ac
Short circuit current > 50 mA ac
Measuring frequency 128 Hz
Maximum permissible
overload
250 Veff
Electrical specifications
Maximum deviations
Parameter Influence factor Deviation influence
E1Position 0 %
E2Supply voltage 0 %
E3Temperature E32.3 %
E4Serial interference voltage (20 V) 0.6 %
E5Probe- and auxiliary probe resistance 10 %
Test voltage 3.7 kV
Protection type IP 40; IEC/EN 60529
Electromagnetic
compatibility
Emission: IEC/EN 61326 Class B
Immunity: IEC/EN 61326 Annex C
Measuring time 8 seconds (average from when START is pressed)
Limit input Tester retains set value even if instrument is turned off (assuming
battery power supply is sufficient)
Note: If tester detects stray interference voltage ≥ 20 V, W is displayed and the measurement is not started.
Measuring
range Resolution Display range
Intrinsic
uncertainty
Operating uncer-
tainty IEC 61557[1]
0.15 W to 20 W0.01 W0 to 19.99 W± (6 % of
measured value
+ 5D)
± (18 % of measured
value + 5D)
200 W0.1 W20 to 199.9 W
2 kW1 W200 to 1999 W
Notes:
[1] Covers all deviations caused by influence quantities E1-E5.
If the deviation E4 caused by high probe or auxiliary probe resistance is higher than specified flashes.
Measured values are outside of the specified operating uncertainty.
Ordering information
Fluke-1621 Earth Ground Tester
Includes:
• Users manual
• Two measuring leads with
alligator clips, 2 m (6 ft)
• One battery, 9 V alkaline (LR61)
• One protective holster, yellow
• One CD-ROM
Optional accessories
• Cable-Reel 50 m Ground/Earth
Cable Reel 50 M Wire (162.5 ft)
• Cable-Reel 25 m Ground/Earth
Cable Reel 25 M Wire (81.25 ft)
• Earth Stake Ground/Earth Stake
• ES-162P3 Stake Set for 3-Pole
Measurement (includes three
stakes, one 50 M cable reel,
and one 25 M cable reel)
Automatic changeover of resolution
RHResolution
< 7 kW0.01 W
< 50 kW0.1 W
> 50 kW1 W
Interference voltage display dc + ac
Vmax 30 Veff
Common mode rejection > 80 dB at 50 Hz and
60 Hz
Ri 680 kW
Measuring uncertainty < 10 % for pure ac
and dc signals
Fluke. Keeping your world
up and running.®
Fluke Corporation
PO Box 9090, Everett, WA USA 98206
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. (800) 443-5853 or
Fax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com
©2007 Fluke Corporation. All rights reserved.
Specifications subject to change without notice.
Printed in U.S.A. 6/2007 3057417 D-EN-N Rev A
