Assuming:
U IN(
-
) = 10 * U
diff
U IN(+) = 0 V
Results in:
U
iso
= 10 * U
diff
/ 11M * 10M = 9.1 * U
diff
If the maximum specified U
diff
of 1 kV is considered, both U IN(
-
) and U
iso
are
way above the channels specification.
12.2.8
Using the High Precision Differential Probe
Figure 12.9:
High Precision Differential Probe (HDP)
The High Precision Differential Probe is designed to reduce the resistive/current
load on the device under test by increasing the input impedance to 10 MΩ with
0.2% in
-
accuracy. The use of the 10:1 divider reduces the lowest user range to
±
0.1 V (
±
0.2 V when using GN610/GN611). The highest input range is
±
1000 V due to the maximum voltage rating of the probe.
-
+
ADC
U
out
U
in
Isolated Channel
Divider Probe
Figure 12.10:
High Precision Differential Probe concept
Different to standard probes the HDP uses a balanced input divider, that
matches both the resistive and capacitive characteristics of the GN610B/
GN611B/GN610/GN611 acquisition cards. Therefore users do not need to
perform probe compensations before using this probe.
GEN3t
262
I3995-3.1 en HBM: public