15.4
Current shunt measurements
Special care must be taken with shunt measurements. Typical shunt
measurements generate signals with an amplitude of only a few volts or even
mV. To prevent interference from higher voltage signals (up to 100 V), the
following guidelines apply:
l
Use only coaxial cables for all measurements.
l
If possible, place the instrument as close as possible to the test object to
reduce the length of the coax cable.
l
Physically separate the low voltage signal lines from the high voltage signal
lines as much as possible. Do not combine them. When the high voltage
signals include high frequency transients, these will easily cross over to the
low voltage signals.
HINT/TIP
The GEN DAQ series instruments typically have a very high bandwidth.
Potential higher frequency transients are measured as a result of the high
bandwidth. Using other lower bandwidth equipment can not measure these
results. Use the filter to reduce the bandwidth to a physically relevant value.
GEN3i
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I3763-3.1 en HBM: public
