HBM GEN3i, Руководство пользователя, Страница: 223 / 1160

Standard this probe uses a divide by 10 input stage. Either use the Perception
Sensor Database to apply the correct probe or use a technical unit multiplier
10 to scale the channels input sensitivity to match the attached probe.
IMPORTANT
Although the HDP probe uses a divide by 10 factor, the highest available
input range is not scaled by a factor of 10. The HDP is not specified to be
used above 1000 V RMS. So both highest input range and maximum
isolation voltages are unchanged when using the HDP probe together
with the GN610B/GN611B/GN610/GN611 acquisition cards.
To increase the maximum input range of the GN610B/GN611B/GN610/GN611
input card a similar HDP probe concept can be used. However as the channels
are NOT connected to earth the isolation specification of 1000 V RMS will not
be increased by such a probe design. Extra care must be taken to prevent over
voltages on the input pins of the GN610B/GN611B/GN610/GN611 acquisition
cards.
It is recommended to use the following approach:
-
+
ADC
U
out
U
in
Isolated Channel Divider Probe
Figure 12.11: Differential Probe concept with common mode divider
In this setup the output of the probe is dividing the input U
in
to earth on both
inputs.
WARNING
Make sure when using such a probe the U+ and U
-
of the GN610B/GN611B/
GN610/GN611 channel never exceeds the specification of 1000 V DC.
GEN3i
I3763-3.1 en HBM: public 223