Test 2-1: Closed-Channel Resistance Test
The purpose of this test is to verify that all relay contacts meet the
Normally Open
Contacts 1. Hardware Connections
Figure 2-2. Closed-Channel Resistance (NO channels)
2.Equipment Setup
•Set DMM to:
•Send *RST to the switch to open all NO contacts.
3.
•Send CLOS (@100) to the switch to close channel 00.
•Trigger the DMM and record the reading.
4.
•Send OPEN (@100) to the switch to open channel 00.
•Trigger the DMM and verify that an open circuit is indicated (>108 Ω).
5.Closed- and
•Repeat steps 3 and 4 for channels 01 through 15. Use
CLOS (@ccnn) and OPEN (@ccnn), where
cc= switch card number
Chapter 2 | Verification Tests 23 |
