Fluke 1621 Earth Ground Tester
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Handheld earth ground testing for mobile use
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.
Features
- 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
- Safety rating CAT II 600 V
Technical Specification
| 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) | |
| 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 |
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.
Electrical specifications
Maximum deviations
| Parameter | Influence factor | Deviation influence |
|---|---|---|
| E1 | Position | 0 % |
| E2 | Supply voltage | 0 % |
| E3 | Temperature E3 | 2.3 % |
| E4 | Serial interference voltage (20 V) | 0.6 % |
| E5 | Probe- and auxiliary probe resistance | 10 % |
| Test voltage | 3.7 kV |
|---|---|
| Protection type | IP 40; IEC/EN 60529 |
| Electromagnetic | Emission: IEC/EN 61326 Class B |
| compatibility | Immunity: IEC/EN 61326 Annex C |
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 |
| Measuring range | Resolution | Display range | Intrinsic uncertainty | Operating uncertainty IEC 61557[1] |
|---|---|---|---|---|
| 0.15 W to 20 W | 0.01 W | 0 to 19.99 W | ± (6 % of measured value + 5D) | ± (18 % of measured value + 5D) |
| 200 W | 0.1 W | 20 to 199.9 W | ||
| 2 kW | 1 W | 200 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.
| 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.
Automatic changeover of resolution
| RH | Resolution |
|---|---|
| < 7 kW | 0.01 W |
| < 50 kW | 0.1 W |
| > 50 kW | 1 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 |
