Bently Nevada 3500/15-02-00-00 Monitoring Card

Description

3500/15-02-00-00 The following sections describe how to test alarms, verify channels, and test OK

limits for channels configured as Thrust Position and Differential Expansion. The

output values and alarm setpoints are verified by 3500/15-02-00-00 varying the input DC voltage

from a power supply and observing that the correct results are reported in the

Verification screen on the test computer.

3500/15-02-00-00 Run the Rack Configuration Software on the test computer. Choose Verification

from the Utilities menu and choose the proper Slot number and Channel number

then click on the Verify button.

The following table directs you to the starting page of each maintenance section

associated with the Thrust Position and Differential Expansion Channels.

3500/15-02-00-00 The general approach for testing alarm setpoints is to simulate the Thrust Position

and Differential Expansion signal with a power supply. The alarm levels are

tested by varying the DC voltage and observing that the correct results are

reported in the Verification screen on the test computer. It is only necessary to

test those alarm parameters that are configured and being used. The general

test procedure to verify current alarm operation will include simulating a

transducer input signal and varying this signal:

1. to exceed over Alert/Alarm 1 and Danger/Alarm 2 Setpoints.
2. to drop below any under Alert/Alarm 1 and Danger/Alarm 2 Setpoints.
3. to produce a nonalarm condition.

3500/15-02-00-00 Direct

1. Disconnect PWR, COM, and SIG field wiring from the channel terminals on

the I/O module.

2. Connect test equipment and run software as described in Section 5.1.5.5
3. (Test Equipment and Software Setup – Thrust Position and Differential

   Expansion).

   3. Adjust the power supply to produce a voltage that is within the Direct

   setpoint levels on the Direct bar graph display of the Verification screen.

   4. Press the RESET switch on the Rack Interface Module (RIM). Verify that the

   OK LED is on, the bar graph indicator for Direct is green, and the Current

   Value field has no alarm indication.

   5. Adjust the power supply voltage such that the signal just exceeds the

   Direct Over Alert/Alarm 1 setpoint level. Wait for 2 or 3 seconds after the

   alarm time delay expires and verify that the bar graph indicator for Direct

   changes color from green to yellow and that the Current Value Field

   indicates an Alarm.

   6. Press the RESET switch on the Rack Interface Module (RIM). Verify that the

   bar graph indicator for Direct remains yellow and that the Current Value

   Field still indicates an Alarm.

   7. Adjust the power supply such that the signal just exceeds the Direct Over

   Danger/Alarm 2 setpoint level. Wait for 2 or 3 seconds after the alarm

   time delay expires and verify that the bar graph indicator for Direct

   changes color from yellow to red and that the Current Value Field

   indicates an Alarm.

   8. Press the RESET switch on the Rack Interface Module (RIM). Verify that the

   bar graph indicator for Direct remains red and that the Current Value Field

   still indicates an Alarm.

   9. Adjust the power supply voltage such that the signal reads below the Over

   Alarm setpoint levels. If the nonlatching option is configured, observe that

   the bar graph indicator for Direct changes color to green and that the

   Current Value Box contains no indication of alarms. Press the RESET

   switch on the Rack Interface Module (RIM) to reset latching alarms.

   10. Repeat steps 3 through 9 to test the Under Alert/Alarm 1 and Under

   Danger/Alarm 2 setpoints by adjusting the power supply to exceed the

   Under Alarm setpoint levels.

   11. If you can not verify any configured alarm, recheck the configured

   setpoints. If the monitor still does not alarm properly or fails any other

   part of this test, go to Section 5.1.10 (If a Channel Fails a Verification Test).

4. 12. 3500/15-02-00-00 Disconnect the test equipment and reconnect the PWR, COM, and SIG field

   wiring to the channel terminals on the I/O module. Verify that the OK LED

   comes on and the OK relay energizes. Press the RESET switch on the Rack

   Interface Module (RIM) to reset the OK LED.

   13. Repeat steps 1 through 12 for all configured channels.

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