The Emerson PR9268/200-000, also cataloged as the PR9268/200 Absolute Vibration Sensor, operates as a dedicated hardware component for seismic bearing housing velocity measurement within AMS Machinery Health Monitor platforms.

Part Number Structure & Model Designations

• Base Model (PR9268/200): Electrodynamic velocity transducer housing designed for vertical or omnidirectional bearing shell vibration monitoring.
• Option Code (-000): Standard sensitivity variant with integral terminal connector interface and unarmored connection geometry.

Core Electrical & Physical Properties

Process Loop Integration & Channel Isolation

The moving-coil assembly generates an AC voltage output directly proportional to absolute vibration velocity without external excitation power. When connected to machinery protection monitors, the raw signal routes through channel-to-channel isolation networks to prevent ground loops. Output channels interface with 4-20 mA HART loop protocol transmitters or DCS analog inputs for continuous trend analysis across industrial fieldbus architectures.

Delivery Package Inventory

• 1 x Emerson epro PR9268/200-000 electrodynamic velocity transducer
• 1 x M8 mounting stud hardware fastener
• 1 x Individual factory calibration certificate sheet

Mechanical Assembly & Wiring Directives

Mounting Surface & Orientation Requirements

• Machine mounting surfaces must be machined flat and perpendicular to the vertical axis of vibration.
• Torque the M8 mounting stud to 8 Nm ensuring metal-to-metal contact between transducer base and housing.

Signal Line Termination & Grounding

• Route twisted shielded pair field cables away from high-current power cables to reduce EMI coupling.
• Connect cable shield continuously to the monitoring rack ground terminal at one single end only.

Frequently Asked Questions

• What is the primary physical quantity measured by the PR9268/200-000?

  It measures absolute vibration velocity on rotating machinery housings and bearing pedestals.

• Does the PR9268/200-000 sensor require external power?

  No, the electrodynamic moving-coil design is self-generating and produces an AC voltage output directly.

• What does the -000 suffix designate in the ordering code?

  The -000 suffix designates the standard basic sensor configuration without specialized high-temperature cabling options.

• What mounting orientation is required for this specific variant?

  The PR9268/200 variant is designed specifically for vertical mounting orientations on bearing housings.

• How should field wiring shields be terminated to prevent noise?

  Cable shields must be connected at one end only at the monitoring system chassis ground to prevent ground loops.

• What sensitivity is provided by the electrodynamic system?

  The sensor provides a nominal sensitivity of 28.5 mV/mm/s across its linear operational frequency band.

• Can this velocity transducer connect directly to DCS analog inputs?

  It requires signal conditioning modules or monitor racks to convert raw AC signals to 4-20 mA loops.

• What thread size is used to attach the sensor to the machine?

  The base housing utilizes a standard M8 threaded mounting stud for rigid mechanical attachment.