Service Information; Checking Defective Relay(S) - Keysight U2751A User's And Service Manual

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Service Information

Checking Defective Relay(s)

It is recommended to have the relay(s) checked when it reaches 10 million cycle
NOTE
counts. The relay cycle count can be obtained by using the Keysight
Measurement Manager or sending the following SCPI command:
DIAGnostic:RELay:CYCLes? (@<ch_list>)
To check for any defective relay, the equipment required is a digital multimeter
with continuity feature.
1 Close the particular relay(s). For example: The relay located at Row x Column y.
2 By referring to the connector configuration of the DSub connector, connect
3 Once this is done, use the same method and perform the same test on pins
4 Now, open the particular relay(s). Using the same method, check if pins RxL and
Figure 4-1
46
one of the DMM test leads to pin RxL and another test lead to pin CyL. The
DMM should indicate that these two pins are connected or shorted.
RxH and CyH. These two pins should be connected or shorted as well.
CyL are disconnected. Perform the same test on pins RxH and CyH as well.
Row 1
Defective relay(s) check
Column 1
Keysight U2751A User's and Service Guide