Bently 19047-01/19047-02 Differential Expansion Sensor

Description

19047-01 Represents the transducer DC voltage corresponding to the zero indication on the

channel’s meter scale for the direct proportional value. The amount of

adjustment allowed is dependent upon the Direct Full Scale Range and the

transducer OK limits. For maximum amount of zero adjustment, gap the

transducer as close as possible to 19047-01 the ideal zero position voltage based on the

full-scale range, the transducer scale factor, and the Upscale Direction. For a

mid-scale zero the ideal gap is the center of the range.

Adjust Button

19047-01 Adjust the Zero Position voltage. When this button is clicked a utility starts that

helps you set the direct zero position voltage. Since this utility provides active

feedback from the 3500 rack, a connection with the rack is required. Refer to

Section 5.2 (Adjusting the Scale Factor and the Zero Position).

19047-01 The following transducer types are available for the Differential Expansion

Channel:

25mm Extended Range Proximitor

35mm Extended Range Proximitor

50mm Extended Range Proximitor

Nonstandard

Customize button

Used to adjust the Scale Factor of transducers. If Non-standard is selected as the

transducer type, the OK Limits can also be adjusted. The Non-standard

transducer’s scale factor must be between 8.5 and 23 mV/mil. Also,19047-01 there must

be at least 2 volts between the Upper and Lower OK Limits.

Returns the position of the Transducer Jumper on the Proximitor/Seismic I/O

Module. Refer to Section 4.1(Setting the I/O Jumper)for the function of this

jumper.

Alarm Mode

Latching

Once an alarm is active, it will remain active even after the proportional value

drops below the configured setpoint level. The channel will remain in alarm

19047-01 until it is reset using one of the following methods:

– the reset switch on the front of the Rack Interface Module

– the contact on the Rack Interface I/O Module

– the Reset button in the Operator Display Software

– the reset command through the Communication Gateway Module

– the reset command through the Display Interface Module

– the reset command in the Rack Configuration Software

Nonlatching

When an alarm is active, it will go inactive as soon as the proportional

value drops below the configured setpoint level. 19047-01 Alert should be the first

level alarm that occurs when the transducer signal level exceeds the

selected value. Danger should be the second level alarm that occurs

when the transducer signal level exceeds the selected value. The Alert and

Danger values are set on the Setpoint screen.

Upscale Direction

19047-01 Towards or away from the probe mounting. This field defines whether rotor

movement toward or away from the differential expansion corresponds to a

more positive differential expansion (for example upscale on a bar graph). If this

field is set to “Toward Probe”, then as the rotor moves toward the differential

expansion probe the differential expansion direct proportional value will increase

and go upscale on a bar graph.

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