Bently 991‑01‑XX‑01‑00 288865‑01 Position Transmitter

Product Brief Introduction Bently 991‑01‑XX‑01‑00 288865‑01 is Bently Nevada 991 series shaft position transmitter assembly. It cooperates with proximity probe to monitor shaft displacement, thrust position and gap value of rotating machinery. It converts gap voltage signal into standard 4‑20mA analog output for DCS or PLC system reading. 288865‑01 is corresponding assembly part number.
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Technical Specifications Loop power supply DC24V. 4‑20mA analog output. Operating temperature ‑40℃ ~ +85℃, humidity 5%‑95% non‑condensing. Field‑mount sealed housing, two‑wire loop power supply. Compatible with 3300 series proximity probe system.

Functional Features Shaft displacement and thrust position measurement based on proximity probe signal. Signal conditioning and conversion processing. Standard 4‑20mA output. Probe cable fault diagnosis including open‑circuit and short‑circuit. Field‑mount installation design.

Application Scenarios Steam turbine thrust position monitoring, compressor shaft displacement supervision, high‑speed rotating machinery shaft gap measurement, petrochemical and power plant turbomachinery auxiliary measurement points.

Performance Parameters Measurement accuracy meets Bently proximity transducer system specification. Adapt to continuous field industrial operation.

Structural Characteristics Sealed metal field‑installation housing. External wiring terminals. Support DIN‑rail and wall‑mount installation mode.

Working Principle Receive gap voltage signal from proximity probe and preamplifier. Internal circuit completes signal conditioning and calculation, converts shaft gap displacement value into 4‑20mA current signal and outputs to upper‑level control system.

Installation Requirements Install transmitter in proper field location, fix housing firmly. Complete two‑wire loop wiring and probe signal wiring strictly according to drawing. Confirm DC24V loop power supply normal. Avoid strong electromagnetic interference and mechanical impact.

Usage Notes Must match corresponding proximity probe and preamplifier parameters. Check wiring condition periodically. Prevent corrosive medium damage to housing and terminals.




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