Bently 3500/92 Communication Gateway 3500/92-04-01-00

Description

3500/92-04-01-00 The following test equipment and procedure should be used in the verification of

the recorder outputs. Recorder outputs for the 3500/42 Proximitor/Seismic

Monitor Module are 4 to 20 mA.

1. Disconnect the COM and REC field wiring from the channel terminals on the

I/O module.

2. Connect a multimeter to the COM and REC outputs of the I/O module. The

multimeter should have the capability to measure 4 to 20 mA.

3 3500/92-04-01-00 If the proportional value is not Gap:

Set the proportional value that the recorder is configured for to full-scale

(Refer to the proportional value of the channel pair type you are testing in the

Verify Channel Values portion of this manual). Verify that the recorder output

is reading 20 mA ±1 %. Go to step 4.

If the proportional value is Gap:

Set the Gap proportional value to -18.00 Vdc (Refer to the proportional value

of the channel pair type you are testing in the Verify Channel Values portion

of this manual). Verify that the recorder 3500/92-04-01-00 output is reading 16 mA ±1 %.

4. Set the proportional value that the recorder is configured for to mid-scale.

Verify that the recorder output is reading 12 mA ±1 %.

5. Set the proportional value that the recorder is configured for to bottom-scale.

Verify that the recorder output is reading 4 mA ±1 %.

6. Disconnect transducer input and verify that the recorder output is matches the

set monitor clamp value ±1 %.

7. If you can not verify the recorder output, the recorder configuration and

connections should be checked. If the monitor recorder output still does not

verify properly, go to Section 5.1.11 (If a Channel Fails a Verification Test).

8. Disconnect the multimeter and reconnect the COM and REC field wiring to

the channel terminals on the I/O module.

9. Repeat steps 1 through 8 for all configured recorder channels

3500/92-04-01-00 When handling or replacing circuit boards, always be sure to adequately protect

against damage from Electrostatic Discharge (ESD). Always wear a proper wrist

strap and work on a grounded conductive work surface.

1. Save the configuration for the module using the Rack Configuration Software.
2. Replace the module with a spare. Refer to the installation section in the 3500

Monitoring System Rack Installation and Maintenance Manual (part number

129766-01).

3. Return the faulty board to Bently Nevada Corporation for repair.
4. Download the configuration for the spare module using the Rack

Configuration Software.

Verify the operation of the spare.

This section shows how to adjust the 3500/92-04-01-00 transducer scale factor and the transducer

position, or “zero”. The Scale Factor Adjustment can be used to accommodate

any deviations in transducer scale factor as measured on the installed

transducers. Do not use the procedure to compensate for any errors within the

monitor and the I/O module. If a monitor does not meet specifications, exchange

it with a spare and return the faulty module to Bently Nevada Corporation for

repair. The newly installed spare module should be properly configured and

tested.

3500/92-04-01-00 Adjusting the scale factor affects the readings of all configured parameters

associated with the channel. If you change the scale factor, be sure to use the

new value when calculating inputs for verification of channel values.

The Zero Position Adjustment is used for Thrust, Eccentricity, and Differential

Expansion measurements as well as for Gap measurements when Gap is

configured to read in displacement units (not volts). Adjust the zero position after

the probe is gapped and its target is in the proper position.

Both adjustment procedures consist of using the Rack Configuration Software to

upload the configuration from the rack, change the setting for scale factor or zero

position, and then downloading the new configuration back to the rack. You can

adjust these settings using the following two methods:

enter a new value in the scale factor box on the transducer screen or the zero

position box on the Channel Options screen.

use Adjust to get immediate feedback from the channel on the Adjust screen.

The advantage of using the Adjust screen is 3500/92-04-01-00 that you can use the bar graphs to

see the effect of your adjustments on the output signals of the channel. The

following procedures show how to use the methods.

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