20 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 3-1 Voltage 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- 1). Ensure that no
load is 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 current, I
clamp
.
e Program the drive voltage, V
drive
.
3 Enable the output.
4 Wait for a few seconds for the output to settle.
5 Record the voltage reading on the DMM, V
meas
.
6 Read back the drive voltage over the USB.
7 Record the readback voltage reading over the USB, V
rdbk
.
8 Compute (V
meas
– V
drive
) and (V
rdbk
– V
meas
). Compare
the values with the test limit values.
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