Agilent Technologies E1364A - Manual (Page 23)

Test 2-1: Closed-Channel Resistance Test
The purpose of this test is to verify that all relay contacts meet the
closed-channel resistance specification for the switch module. If the
closed-channel resistance of any contact is greater than 3.5
Ω
, the relay
should be replaced.
Normally Open
Contacts 1. Hardware Connections
2. Equipment Setup
•
Set DMM to: 4-wire ohms, autorange.
•
Send *RST to the switch to open all NO contacts.
3. Closed-Channel Reading (channel 00)
•
Send CLOS (@100) to the switch to close channel 00.
•
Trigger the DMM and record the reading.
4. Open-Channel Reading (channel 00)
•
Send OPEN (@100) to the switch to open channel 00.
•
Trigger the DMM and verify that an open circuit is indicated
(>10
8 Ω ).
5. Closed- and Open-Channel Readings (channels 01-15)
•
Repeat steps 3 and 4 for channels 01 through 15. Use
CLOS (@ccnn) and OPEN (@ccnn) , where
cc = switch card number (01-99, leading zero not necessary)
nn = channel number (00-15)
Figure 2-2. Closed-Channel Resistance (NO channels)
Chapter 2 Verification Tests 23