9 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers
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 Intrinsic error Operating errors
0.020 7 to 300 k7 0.001 7 to 2.999 7 0.001 7 ± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)
3.0 7 to 29.99 7 0.01 7
30 7 to 299.9 7 0.1 7
300 7 to 2999 7 1 7
3.0 k7 to 29.99 k7 10 7
30.0 k7 to 299.9 k7 100 7
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 7 in wire E can cause additional error of 5m 7/7.
Measuring range Display range Resolution Intrinsic error Operating error
0.020 7 to 3 k7 0.001 7 to 2.999 7 0.001 7 ± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)
3.0 7 to 29.99 7 0.01 7
30.0 7 to 299.9 7 0.1 7
300 7 to 2999 7 1 7
Measuring sequence Approx. 2 measurements/s
Measuring time Typ. 4 sec. incl. reversal of polarity (2-pole or 4-pole)
Max. interference voltage b 3 V ac or dc, with higher voltages measurement will not be started
Max inductivity 2 Henry
Max. overload U
rms
= 250 V
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 7, variable from 0.000 to 29.99 7 by means of measuring adjustment.
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