Bently 3500/92-01-02-00 Communication Gateway Module Card

Description

3500/92-01-02-00 The general approach for testing alarm setpoints is to simulate the Acceleration

signal with a function generator and power supply. The alarm levels are tested

by varying the output from the test equipment and observing that 3500/92-01-02-00 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.

3500/92-01-02-00 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.

3500/92-01-02-00 Direct

1. Disconnect PWR / B, COM, and SIG / A field wiring from the channel

terminals on the I/O module.

2. Connect test equipment and run software as described in Section 5.1.9.1

(Test Equipment and Software Setup – Acceleration). If no filtering has been

configured, leave the frequency of the function generator set to 100 Hz. If

filtering is configured, the needed frequency can be calculated from the

following formula:

Frequency = (0.89 × HPF) + (0.1575 × LPF)

HPF = High-pass Filter Corner Frequency

LPF = Low-pass Filter Corner Frequency

If no filtering is configured, set the frequency of the function 3500/92-01-02-00 generator to 100

Hz.

If a low-pass filter is configured and no high-pass filter is configured, use the

following to determine the HPF to use in the formula:

– If the units are integrated or rms, use a HPF of 10 Hz. For any other

configuration, use a HPF of 3 Hz.

If a high-pass filter is configured and no low-pass filter is configured, use the

following to determine the LPF to use in the formula:

– If the configuration is a single 3500/92-01-02-00 channel with no integration, use a LPF

of 30 kHz.

– If the configuration is a single channel with integration, use a LPF of

14.5 kHz.

– If the configuration is a dual channel pair, use a LPF of 9.155 kHz.

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