Technical data

Calibration Procedures 3
34980A Service Guide 75
Use the DIAGnostic:RELay:CYCLes? (@<ch_list>) command to read relay
cycle counts on the following modules:
• 34921A through 34925A Multiplexer Modules
• 34931A through 34933A Matrix Modules
• 34937A and 34938A GP Switch Modules
• 34941A and 34942A RF Multiplexer Modules
• 34946A and 34947A Microwave Switch Modules
Use the
DIAGnostic:DMM:CYCLes? {1|2|3|4|5|6} command to read relay
cycle counts for the internal DMM function and range relays.
By maintaining a count you can estimate which relays are nearing the end
of their useful life.
Relay Contact Resistance Verification (Optional)
The Agilent Y1131A Verification/Diagnostic Software Kit contains software
and hardware used to test the relay switching modules available for the
Agilent 34980A Multifunction Switch/Measure Unit. The software provides
module–specific tests to assist you with troubleshooting possible relay
failures and predicting system maintenance requirements. Custom terminal
blocks are provided to route signals and isolate individual relays for
verification and diagnostics.
For several of the relay switching modules, it is very difficult to isolate a
particular channel. The Y1131A Verification/Diagnostic Software used in
conjunction with the provided verification terminal blocks attempts to
isolate measurement channels in a repeatable manner.