3500/42 Operation and Maintenance
Maintenance
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5. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
monitor OK LED is on and that the Channel OK State line in the Channel
Status section of the Verification screen reads OK.
6. Verify that the OK relay on the Rack Interface I/O Module indicates OK
(energized). See the 3500/20 Rack Interface Module Operation and
Maintenance Manual, part number 129768-01.
7. Increase the power supply voltage (more negative) until the OK LED just
goes off (upper limit). Verify that the Channel OK State line on the
Verification screen 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 input voltage.
8. Decrease the power supply voltage (less negative) to -7.00 Vdc.
9. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
OK LED comes back on and the OK relay energizes. Verify that the Channel
OK State line in the Channel Status section reads OK.
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 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,
and SIG 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.
For Velomitors with TMR I/O Modules:
Due to the requirements for increased robustness in the TMR system, the TMR
I/O Module has a Velomitor interface that is different from the standard I/O
Module's Velomitor interface. The effect of this difference is that the Velomitor
signal input to the I/O Module is 180 degrees out of phase from the correct
Velomitor signal. This inversion is compensated for in the TMR I/O Module. This
means that when you input a test signal using a signal generator or DC power
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