Description

Configured for casing vibration measurements in rotating machinery, the Bently Nevada 9200-03-02-02-00 (9200 Velocity Seismoprobe Transducer) provides direct physical/electrical execution. The instrument converts mechanical casing velocity into a proportional voltage signal without requiring an external power source. It detects absolute vibration relative to free space, operating on a moving-coil design that maintains linearity across its calibrated frequency range. The output feeds directly into standard continuous monitoring systems for permanent machinery protection.

Hardware Specifications

Machinery Monitoring and TSI Characteristics

Because the transducer operates under stringent Turbine Supervisory Instrumentation (TSI) criteria, cross-talk suppression and internal damping dictate signal fidelity. The design avoids the eddy-current probe scaling restrictions seen in proximity systems by utilizing a spring-suspended coil moving through a permanent magnetic field. It measures structural casing vibration directly, resolving high-frequency rotor dynamics transmitted through the bearing housing. The internal suspension geometry ensures that off-axis cross-talk suppression exceeds 20:1, which prevents transverse machine case motion from corrupting the primary axis measurement path.

Frequently Asked Questions

Q: Does this velocity transducer support hot-swap replacement while the monitoring system is online?

A: Yes. Because the transducer utilizes a self-generating two-wire configuration with no external power consumption, operators can safely disconnect and replace the sensor body without powering down the monitoring backplane or risking overcurrent damage to the I/O module.

Q: What are the specific configuration limits dictated by the 03-02-02-00 suffix matrix?

A: The suffix combination defines the physical build options. The “03” designates a top-mount connector layout with a standard 100 deg upward inclination allowance, “02” selects the standard internal damping coefficient, the second “02” specifies a 1/2-20 UNF mounting thread adapter, and the final “00” indicates no multi-agency approvals.

Field Installation Guidelines

• Thread Engagement and Torque: Verify that the 1/2-20 UNF mounting stud achieves at least 5 full threads of engagement into the machine casing. Torque the transducer base to exactly 6.8 N-m (60 in-lb) to prevent structural resonance shifts.
• Cable Shielding and Grounding: Terminate the outer shield of the twisted-pair interconnect cable exclusively at the monitor instrument chassis ground. Leave the shield floating and isolated at the transducer end to eliminate ground loop currents.
• Conduit and Routing Restrictions: Secure the flexible conduit to fixed structural supports within 300 mm of the sensor body. This prevents case-to-cable differential movement from generating mechanical noise or causing fatigue failure at the 2-pin connector termination.