Datasheet

4 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage Vm = 48 V ac
Short-circuit current > 50 mA
Measuring frequency 128 Hz
Probe resistance (R
S
) Max. 100 kΩ
Auxiliary earth electrode resistance (R
H
) Max. 100 kΩ
Monitoring of R
S
, and R
H
with error indicator
Automatic range selection
Measurement is not performed if the current through the current clamp is too low
Stakeless ground loop measurement ( )
Switch position Resolution Measuring range Accuracy Operating error
R
A
4-pole 0.001 Ω to 0.1 Ω 0.020 Ω to 199.9 Ω ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)
Measuring principle: Stakeless measurement of resistance in closed loops using two current transformers
Measuring voltage Vm = 48 V ac (primary)
Measuring frequency 128 Hz
Noise current (I
EXT
) Max. I
EXT
= 10 A (ac) (R
A
< 20 Ω)
Max. I
EXT
= 2 A (ac) (R
A
> 20 Ω)
Automatic range selection
The information regarding stakeless ground loop measurements is only valid when used in conjunction with the recommended current clamps at the minimum
distance specified.