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Bently Nevada 87900-02 Valve Position Transducer

The Bently Nevada 87900-02, also cataloged as the 87900-02 Valve Position Transducer, operates as a dedicated hardware component for valve actuator position measurement within Bently Nevada machinery monitoring systems. It converts mechanical valve travel into an electrical position feedback signal.

Hardware Specifications

Parameter	Specification
Model	87900-02
Brand	Bently Nevada
Origin	USA
Product Type	Valve Position Transducer
Measurement Principle	Mechanical displacement to electrical position conversion
Input	Valve actuator mechanical travel
Output Signal	Analog position feedback signal, configuration dependent
Measurement Range	Configuration dependent
Supply Voltage	System configuration dependent
Operating Temp	Industrial operating range, configuration dependent
Power Consumption	Configuration dependent
Mounting Type	Valve actuator position sensing assembly
Application	Valve position monitoring and turbine control feedback

Eddy-Current Position Measurement and TSI Integration

The Bently Nevada 87900-02 applies position measurement techniques used in turbine supervisory instrumentation environments. The signal path is configured to convert mechanical valve movement into electrical feedback suitable for monitoring and control interfaces.

For machinery monitoring applications, proper sensor calibration establishes the relationship between mechanical travel and electrical output. Moreover, signal verification procedures are required to maintain correct valve position indication during equipment operation.

Bently Nevada TSI systems commonly apply gap voltage validation methods, including -10 VDC probe gap targets, for confirming eddy-current sensing conditions when applicable. The measurement setup must consider mechanical alignment, rotor dynamics related movement, and potential signal interference during installation.

Frequently Asked Questions

Q: What physical parameter does the Bently Nevada 87900-02 measure?
A: The 87900-02 measures valve actuator position movement by converting mechanical displacement into an electrical feedback signal.

Q: Does the 87900-02 require mechanical calibration after installation?
A: Yes. The transducer requires verification between valve travel position and electrical output to confirm correct measurement response.

Q: Can signal wiring affect the transducer measurement performance?
A: Yes. Cable routing, shielding, grounding, and connection quality affect electrical signal integrity in industrial monitoring installations.

Field Installation Guidelines

• Install the transducer using the specified mechanical mounting arrangement for the valve actuator.
• Verify that the sensing mechanism aligns with the complete valve travel path.
• Route signal cables separately from high-current power conductors to reduce electrical interference.
• Connect cable shielding according to the system grounding requirements.
• Perform position calibration after mechanical installation and before system commissioning.
• Inspect mounting hardware and cable connections during scheduled maintenance intervals.

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