Description

Configured for casing vibration measurement in industrial rotating machinery, the Bently Nevada 16699-01-02-02 (16699 Velocity Seismoprobe) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

Because this moving-coil velocity transducer operates passively, it generates its own raw voltage signal directly proportional to the casing velocity instead of using external proximitor drivers. Nonetheless, during multi-sensor commissioning alongside proximity probes, technicians execute gap voltage validation to eliminate signal contamination on the shared machinery protection rack. The internal architecture of the transducer suppresses cross-talk between high-frequency transmission paths, preventing phase anomalies that distort local rotor dynamics evaluation. Furthermore, the 3500/42M or 3300 monitor modules scale the incoming calibration profiles according to the 500 mV/in/sec factory sensitivity, converting the mechanical case velocity into clear diagnostic variables without tracking a -10 VDC DC bias voltage.

Frequently Asked Questions

Q: Does the 16699-01-02-02 transducer require an external DC power supply to generate the vibration signal?

A: No, the sensor uses an internal moving-coil design that generates an analog voltage output purely from the mechanical motion, which eliminates the need for external loop power.

Q: What happens if field technicians install this specific module at a 45-degree or 90-degree angle relative to its vertical axis?

A: Installing the module outside its designated 0 deg +/-2.5 deg operational window degrades the frequency response and calibration accuracy because gravity compromises the internal spring-mass alignment.

Field Installation Guidelines

• Mechanical Torque Assignment: Mount the circular base onto a flat, machined surface using a 1/4-28 UNF stud. Next, apply a torque specification of exactly 5.6 N-m to ensure uniform mechanical coupling across the interface.
• Shield Grounding: Terminate the shielded twisted-pair cable shield at the monitoring rack instrument ground bus bar. Specifically, isolate and trim back the shield at the two-pin MIL-C-5015 connector housing to prevent ground loop currents from introducing noise into the signal path.
• Conduit Routing: Route the transducer cable through rigid or flexible metal conduit sections. Consequently, segregate these sensor runs from power cabling by at least 300 mm to suppress electro-magnetic cross-talk from nearby motor star-delta starters.