Datasheet

8 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers
* With recommended current clamps/transformers.
Additonal error because of probe- and auxiliary earth
typ. electrode resistance
Measuring error of R
H
and R
S
Typ. of 10 % of R
ETOTAL
+ R
S
+ R
H
Measuring time Typ. 8 sec. with a fixed frequency 30 sec. max. with AFC and complete cycle of
all measuring frequencies
Minimal current in single branch to be measured 0.5 mA With transformer (1000:1)
0.1 mA With transformer (200:1)
Max. interference current through transformer 3 A With a transformer (1000:1)
Resistance measurement (R~)
Measuring method Current and voltage measurement
Measuring voltage 20 V ac, square pulse
Short circuit current > 250 mA ac
Measuring frequency 94, 105, 111, 128 Hz selected manually or automatically (AFC)
Measuring range Display range Resolution Accuracy Operating errors
0.020 Ω to 300 kΩ 0.001 Ω to 2.999 Ω 0.001 Ω ± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)
3.0 Ω to 29.99 Ω 0.01 Ω
30 Ω to 299.9 Ω 0.1 Ω
300 Ω to 2999 Ω 1 Ω
3.0 kΩ to 29.99 kΩ 10 Ω
30.0 kΩ to 299.9 kΩ 100 Ω
Measuring time typ. 6 sec.
Max. interference voltage 24 V, with higher voltages measurement will not be started
Max overload U
rms
max. = 250 V
Resistance measurement (R )
Measuring method current- voltage measurement as per IEC61557-4 possible
Open circuit voltage 20 V dc
Short circuit current 200 mA dc
Formation of measured value with 4-pole measurement wires on H, S, ES can be extended without additional error.
Resistances > 1 Ω in wire E can cause additional error of 5m Ω/Ω.
Measuring range Display range Resolution Accuracy Operating error
0.020 Ω to 3 kΩ 0.001 Ω to 2.999 Ω 0.001 Ω ± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)
3.0 Ω to 29.99 Ω 0.01 Ω
30.0 Ω to 299.9 Ω 0.1 Ω
300 Ω to 2999 Ω 1 Ω
Measuring sequence Approx. 2 measurements/s
Measuring time Typ. 4 sec. incl. reversal of polarity (2-pole or 4-pole)
Max. interference voltage ≤ 3 V ac or dc, with higher voltages measurement will not be started
Max inductivity 2 Henry
Max. overload U
rms
= 250 V