Fluke 1621 Earth Ground Tester
Introduction:
The Fluke 1621 Earth Ground Tester (the Product or Tester) is an easy-to-use instrument for measuring the resistance to earth ground of a specified earth ground electrode. The Tester can perform a 3-pole fall-of-potential test conforming to IEC 61557-5. The Tester can also perform ac resistance testing.
To further simplify and increase the probability of an accurate measurement in the 3-pole mode, the Tester measures the resistance of the probe and auxiliary electrode to verify that they are within prescribed limits. The Tester also tests for stray interference voltage (noise) and indicates if the value is too high to take a proper measurement.
The Tester features a lighted LCD display, automatic shut-off, and a limits mode for setting maximum resistance readings.
The following accessories are shipped with your Product:
- Users manual
- Two measuring leads with alligator clips, 2 m (6 ft)
- One battery, 9 V alkaline (IEC 6LR61)
- One protective holster, yellow
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 1 year |
| Measuring rate | 2 measurements / second |
| 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 |
| Temperature ranges | 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 (-4 °F to +140 °F) Reference: +23 °C ± 2 °C (+73 °F ±4 °F) |
| Temperature Coefficient | ±0.1 % of range per degree Kelvin |
| Safety | IEC 61010-1, 600VCATII, pollution degree 2 |
| Test voltage | 3.7 kV |
| Dimensions | 113 x 54 x 216 mm (4.5 x 2.1 x 8.5 in), including holster |
| Weight | 850 g (1.9 lb), including standard accessories, Volume approximately 600 cm |
| R E 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 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* |
| 0.15 Ω to 20 Ω | 0.01 Ω | 0 Ω to 19.99 Ω | ±(6 % of measured value + 5D) | ±(18 % of Measured value + 5D) |
| 200 Ω | 0.1 Ω | 20 Ω to 199.9 Ω | ±(6 % of measured
value + 5D) |
±(18 % of Measured value + 5D) |
| 2 kΩ | 1 Ω | 200 Ω to 1999 Ω | ±(6 % of measured
value + 5D) |
±(18 % of Measured value + 5D) |
| 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) |
| Interference Voltage Display DC + AC | |
| Vmax | 30 Veff |
| Common mode rejection | >80 dB at 50 Hz and 60 Hz |
| Ri | 680 kΩ |
| Measuring uncertainty | <10 % for pure ac and dc signals |
