LEM ISO plus, Operating Instructions Manual

Page: 30 / 34

Technical Data
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F - Frequency Measurement (at V>0.5V)
Measuring
range
Resolution Intrinsic error
200Hz 0.1Hz
1kHz 1Hz
±
(0.2% of rdg +3D)
Method: Evaluation of zero crossings in signal
Temperature coefficient < 50ppm, sensitivity > 10% of
voltage and current range end value
mA – RMS Current Measurement
Direct current measurement with the following ranges:
Measuring range Resolution Intrinsic error
20…199.9 µA 100 nA ± (3% of rdg+5digit)
0,2…1,999 mA 1 µA
±
(3% of rdg+5digit)
2…19.99 mA 10 µA ±
(3% of rdg+5digit)
20…199.9 mA 100 µA
±
(3% of rdg+5digit)
Specifications valid for AC RMS >5% of range
Displayed values for current measurements: AC
Frequency range: 15Hz…1kHz
Auto range setting time: 2s
Max. overload: 630 mA (Fuse –protection)
Current compensation (ZERO) possible.
Direct current measurement (1:1) or measurement through external current
transformer with current or voltage output (transducer input) possible.
Selectable transformer ratios: 1:1, 1:10, 1:100, 1:500, 1:1000.