Maintenance
3500/42 Operation and Maintenance
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10. Gradually decrease the power supply voltage (less negative) until the OK
LED just goes off (lower limit). 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 Lower OK limit voltage displayed on the Verification
screen is equal to or more negative than the input voltage.
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’t 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,
and SIG field wiring to the channel terminals on the Proximitor/Seismic 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.
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