22 U2722A/U2723A Service Guide
3 Performance Verification and Adjustment
Test Setup
The test setup for no load condition is shown in the
following figure.
Figure 3-2 Current test setup (no load condition)
Test Pr oc edur e
1 Turn off the U2722A/U2723A. Connect the DMM to the
output to be tested (refer to Figure 3- 2). Ensure that
there is no load connected. Turn on the U2722A/U2723A.
2 Configure the selected output as shown in the following.
a Configure the NPLC to 10.
b Configure the voltage range.
c Configure the current range.
d Program the clamp voltage, V
clamp
.
e Program the drive current, I
drive
.
3 Enable the output.
4 Wait for a few seconds for the output to settle.
5 Record the current reading on the DMM, I
meas
.
6 Read back the drive current over the USB.
7 Record the readback current reading over the USB, I
rdbk
.
8 Compute (I
meas
– I
drive
) and (I
rdbk
– I
meas
). Compare the
values with the test limit values.
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