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 Procedure
1
Turn off the U2722A/U2723A. Connect the DMM to the
output to be tested (refer to
). 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.
SMU
+S
+
–
–S
DMM
+
–
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