Bently turbine safety monitoring TSI 3500/15-05-05-00 power module

Description

3500/15-05-05-00 The following sections will describe how to test alarms, verify channels, verify filter

corner frequencies, and test OK limits for channels configured as Velocity. The

output values and alarm setpoints are verified by varying the input signal level

and observing that 3500/15-05-05-00 the correct results are reported in the Verification screen on

the test computer.

3500/15-05-05-00 The general approach for testing alarm setpoints is to simulate the Velocity signal

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

varying the output from the test equipment 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. 3500/15-05-05-00 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/Alarm2 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.

   3500/15-05-05-00 Direct

   1. Disconnect PWR / B, COM, and SIG / A (PWR, COM / A, and SIG / B for TMR

   I/O) field wiring from the channel terminals on the I/O module.

   2. Connect test equipment:

   For Seismoprobe:

   Connect test equipment and run software as described in section 5.1.7.1

   (Test Equipment and Software Setup – Velocity), use the setup shown on

   page 173 (Seismoprobe Test Setup). 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 generator to

   100 Hz.

   If a Low-pass Filter is configured 3500/15-05-05-00 and no High-pass Filter is configured, use

   the following to determine the HPF to use in the formula:

   – If the units are 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

   a LPF of 5,500 Hz.

   Set the frequency of 3500/15-05-05-00 the function generator to this new value. The above

   is done to obtain a test frequency in the center of the channel frequency

   range.

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