Fluke 1623 - Page 26

Fluke 1623
Users Manual
18
Automatic range selection.
Measurement is not performed if the current through the current clamp is too
low.
R
A
4-pole ground resistance measurement (IEC 1557-5)
Switch
position
Resolution measuring range Intrinsic error Operating error
Ra 4-pole 0,001 … 10 Ω 0,001 Ω ...
19,99 kΩ
±(2% rdg + 3 d) ±(5% rdg +
3 d)
Measuring principle: Current/voltage measurement
Measuring voltage: Um = 48 Vac.
Short-circuit current: > 50 mA
Measuring frequency: 128 Hz (125 Hz on request)
Probe resistance (Rs+ Res): max. 100 kΩ
Auxiliary earth electrode resistance
(Rh):
max. 100 kΩ
Additional error from Rh and Rs: Rh[kΩ] x Rs[kΩ/Ra[Ω] x 0,2 %
Monitoring of Rs, and Rh with error indicator.
Automatic range selection.
R
A
3-pole selective ground resistance measurement with current clamp
(R
A
A )
Switch
position
Resolution Measuring range Intrinsic error Operating error
Ra 3-pole
A
0.001 ...
10 Ω
0.001 Ω ..
19.99 kΩ
±(7% rdg + 3 d) ± (10% rdg + 5 d)
Measuring principle: Current/voltage measurement (with external current
clamp)
Measuring voltage: Um = 48 VAC.
Short-circuit current: > 50 mA
Measuring frequency: 128 Hz (125 Hz on request)
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