Specifications

102
Chapter 4 Calibration Procedures
Relay Verification
(Optional) 34904A Relay Contact Resistance Verification
This optional procedure uses an external DMM to make 4-wire ohms
measurements across the relay contacts on the 34904A.
Be sure to read “Plug-in Module Test Considerations” on page 87.
Connect copper shorts from H to L on each of the eight columns (
COL1
through
COL8) as shown below. Connect the HI, LO, Sense HI, and Sense
LO leads to
ROW1 as shown below.
Note: For all steps in the following procedures, after connecting or
moving test leads, route your wiring for proper strain relief and install
the module cover. Install the 34904A in slot 200 of the 34970A.
Test Lead Connections for ROW1
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