3500/42 Operation and Maintenance
Maintenance
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10. Gradually decrease the power supply voltage (less negative) until the OK
LED just goes off (upper limit due to the inversion on the I/O Card). Verify
that the Channel OK State line in the Channel Status section reads not OK
and that the OK Relay indicates not OK. Verify that the Upper OK limit
voltage displayed on the Verification screen is equal to or more positive than
the following value.
11.
Increase the power supply voltage (more negative) to -7.00 Vdc.
12. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
OK LED comes back on, the OK relay energizes, and the Channel OK State
line in the Channel Status section reads OK.
13. If you can not verify any configured OK limit, go to Section 5.1.11 (If a
Channel Fails a Verification Test).
14. Disconnect the power supply and multimeter and reconnect the PWR, COM /
A, and SIG / B field wiring to the channel terminals on the Monitor I/O
Module. Press the RESET switch on the Rack Interface Module (RIM) and
verify that the OK LED comes on and the OK relay energizes.
15. Repeat steps 1 through 14 for all configured channels.
16. Return the bypass switch for all configured channels back to their original
setting.
U p p e r O K
L i m i t V o l t a g e
- 2 2 . 0 2
-
V i n p u t
≥
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