Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 6 Service
Operating Checklist
Operating Checklist
Before returning your instrument to Agilent Technologies for service or
repair, check the following items:
Is the instrument inoperative?
• Verify that the AC power cord is connected to the instrument.
• Verify that the front-panel On/Standby switch has been pushed.
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• Verify that the power-line fuse is installed and not open (see page 50).
The instrument is shipped from the factory with a 500 mAT, 250 V
fuse. This is the correct fuse for all line voltages.
• Verify the power-line voltage setting. See “If the Instrument Does Not
Turn On” on page 50.
Does the instrument fail self-test?
• Verify that the correct power-line voltage is selected. See “If the
Instrument Does Not Turn On” on page 50.
• Remove all input connections to the instrument. Errors may be
induced by AC signals present on the input wiring during a self-test.
Long test leads can act as an antenna causing pick-up of AC signals.
Is the Current measurement function inoperative?
• Verify the input protection fuses on the 34901A Multiplexer Module.
If necessary, replace with a 1.5 A, 250 V NTD fuse.
Note: The Current input is only available on channels 21 and 22 of the
34901A module.
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