BENTLY NEVADA MODULE 3500/60 AND 3500/61 TEMPERATURE MODULE

Description

3500/61The general approach for testing alarm setpoints is to simulate the vibration and

Keyphasor® signal with a function generator. The alarm levels are tested by

varying the vibration signal (both peak to peak amplitude and DC voltage bias)

and observing that the correct results are 3500/61 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, and
2. to drop below any under Alert/Alarm 1 and Danger/Alarm 2 Setpoints and
3. to produce a nonalarm condition.

When varying the signal from an alarm condition to a nonalarm condition, alarm

hysteresis must be considered. Adjust the signal well below the alarm setpoint

for the alarm to clear.

3500/61 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 5.1.5.1

(Test Equipment and Software Setup – Radial Vibration).

3. 3500/61 Set the Keyphasor multiplier/divider so that the multiply setting is one and the

divide setting is one. Adjust the function generator amplitude to produce a

reading that is below 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 contains no alarm indication.

5. Adjust the function generator amplitude 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 function generator amplitude such that the signal just exceeds the

Direct Over Danger/Alarm 2 setpoint level. 3500/61 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

9. Adjust the function generator amplitude 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. If you can’t 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 5.1.11 (If a Channel Fails a Verification Test).

11. 3500/61 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.

12. Repeat steps 1 through 11 for all configured channels.

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