Datasheet

9 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers
Compensation of lead resistance (R
K
)
Compensation of lead resistance (R
K
) can be switched on in functions R
E
3-pole, R
E
4-pole , R~ , and R 2-pole
Formation of measured value R
display
= R
measured
- R
compensated
*
* Value of setpoint entry R
K
= 0.000 Ω, variable from 0.000 to 29.99 Ω by means of measuring adjustment.
Stakeless ground loop measurement ( )
Switch position Resolution Measuring range Accuracy Operating error
R
A
4-pole 0.001 Ω to 0.1 Ω 0.02 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.