Want to make sure your grounding is effective? We have devices to measure soil resistance or soil resistivity. And soil resistance is essential for dissipating fault currents and preventing electrical hazards.
We have the Fluke 1621 kit, an easy-to-use earth ground tester. For earth resistance testing, the 1621 kit is the first line of defense for detecting reliable ground connections. The unit features basic ground test methods including 3-pole fall-of-potential tests and 2-pole earth resistance tests. Its convenient size, rugged case, and large, clear LCD make it an ideal field ground tester for most electrical grounding work environments. With a simple user interface and intuitive functionality, the Fluke 1621 kit is a practical grounding tool for electrical contractors, utility test engineers, and grounding specialists.
This device is crucial for evaluating the quality of the ground connection in electrical systems and for ensuring electrical safety
Key features
- 3-pole fall-of-potential earth ground test for basic measurements
- 2-pole resistance measurements for added versatility
- Easily capture values with one-button operation
- Ensure accurate measurements with automatic “noise” voltage detection
- Hazardous voltage warning provides greater user protection
- Clearly read and record data with a large backlit display
- Hard carrying case
- Rugged case and design for tough work environments
- Portable size allows easy transport
- Get instant alerts for measurements outside your set limit when using the adjustable limit setting
- 600 V CAT II
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General specifications |
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Measurement functions |
3-wire earth ground resistance, conductor resistance in 2-wire AC systems, interference voltage |
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Intrinsic error |
Indicates the reference temperature range and is guaranteed for one year |
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Measurement speed |
2 measurements/second |
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Battery¹ |
One 9-volt alkaline battery (LR61) |
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Battery conditions |
LO-BAT appears when the battery voltage drops below 6.5 V |
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Voltages |
Between connectors H/C2 and E/C1: |
250 Vrms maximum (effective voltage) |
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Between connectors S/P2 and E/C1 |
250 Vrms maximum |
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Climatic class |
VDE/VDI 3540 RZ (complies with KWG per DIN 40040, 4/87) |
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Thermal characteristics² |
Operation |
-10 °C to +50 °C (+14 °F to +122 °F) |
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Operation |
0 °C to +35 °C (+32 °F to +95 °F) |
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Storage |
-20 °C to +60 °C (+68 °F to +140 °F) |
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Reference |
+23 °C ±2 °C (+73 °F ±4 °F) |
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Temperature coefficient |
±0.1 % of range per kelvin |
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Safety |
IEC/EN 61010-1, 600 V CAT II, pollution degree 2 |
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Dimensions |
113 x 54 x 216 mm (4.5 x 2.1 x 8.5 in), including holster |
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Weight |
850 g (1.9 lb), including standard accessories, approximate volume 600 cm³ |
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Electrical specifications |
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Maximum deviations |
E1 Influence factor |
Load |
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E1 Deviation influence |
0 % |
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E2 Influence factor |
Supply voltage |
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E2 Deviation influence |
0 % |
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E3 Influence factor |
E3 Temperature |
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E3 Deviation influence |
2.3 % |
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E4 Influence factor |
Series interference voltage (20 V) |
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E4 Deviation influence |
0.6 % |
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E5 Influence factor |
Probe resistance and auxiliary probe resistance |
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E5 Deviation influence |
10 % |
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Test voltage |
3.7 kV |
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Protection type |
IP 40; IEC/EN 60529 |
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Electromagnetic compatibility |
Emission |
IEC/EN 61326 Class B |
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Immunity |
IEC/EN 61326 Annex C |
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RE Resistance measurement |
Measurement method |
Voltage and current measurement with improved crosstalk attenuation, no measuring lead resistance compensation, with probe (3-wire) or without probe (2-wire), per IEC/EN 61557-5 |
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Open-circuit voltage |
23 to 24 V AC |
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Short-circuit current |
> 50 mA AC |
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Measurement frequency |
128 Hz |
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Maximum permissible overload |
250 Vrms |
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Measurement time |
8 seconds (average from pressing START) |
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Limit input |
The tester retains the set value even if the instrument is switched off (assuming the battery power supply is sufficient) |
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Automatic resolution change |
RH |
< 7 kΩ |
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Resolution |
0.01 Ω |
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RH |
< 50 kΩ |
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Resolution |
0.1 Ω |
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RH |
> 50 kΩ |
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Resolution |
1 Ω |
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DC + AC interference voltage display |
V max. |
30 Vrms |
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Common-mode rejection |
> 80 dB at 50 Hz and 60 Hz |
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Ri |
680 kΩ |
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Measurement uncertainty |
< 10 % for pure AC and DC signals |
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Measuring range |
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0.15 Ω to 20 Ω |
Resolution |
0.01 Ω |
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Display range |
0 to 19.99 Ω |
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200 Ω |
Resolution |
0.1 Ω |
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Display range |
20 to 199.9 Ω |
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2 kΩ |
Resolution |
1 Ω |
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Display range |
200 to 1999 Ω |
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Intrinsic uncertainty |
±(6 % of measured value + 5D) |
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Operating uncertainty IEC 61557³ |
±(18 % of measured value + 5D) |
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