LEM SATURN GEO plus Manual De Instrucciones página 17

Technical Data
R 4- pole selective ground resistance measurement with current clamp (R
A
Switch Measuring range
Resolution
position
Ra 4-pole 0.001 ... 10 Ω 0.001 Ω .. 19.99 kΩ
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage:
Short-circuit current:
Measuring frequency:
Probe resistance (Rs):
Auxiliary earth electrode resistance (Rh):
Monitoring of Rs, and Rh with error indicator.
Measurement is not executed if the current through the current clamp is too low.
.
Automatic range selection
Stakeless ground loop measurement (
Switch Measuring range
Resolution
position
Ra 4-pole 0.001 ... 0.1 Ω 0.001 Ω .. 199.9 Ω
Measuring principle: Stakeless measurement of resistance in closed loops using two
current transformers
Measuring voltage:
Measuring frequency:
Noise current (Iext):
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.
)
A
Intrinsic error Operating error
±(7% rdg + 3 d) ± (10% rdg + 5 d)
Um = 48 VAC.
> 50 mA
128 Hz (125 Hz on request)
max. 100 kΩ
max. 100 kΩ
)
Intrinsic error Operating error
±(7% rdg + 3 d) ± (10% rdg + 5 d)
Um = 48 VAC (primary)
128 Hz (125 Hz on request)
max. Iext = 10 A (AC) (Ra < 20 Ω)
max. Iext = 2 A (AC) (Ra 20 Ω)
>
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