Description

The Bently Nevada 16699-03-05-02, also cataloged as the 16699-03 Velocity Seismoprobe, operates as a dedicated hardware component for mechanical vibration measurement within 3300/3500 Monitoring Systems platforms. The transducer converts physical machine casing velocity into a proportional electrical voltage output signal without external power requirements. Specifically, it employs a moving-coil design that directly generates voltage via magnetic induction, thereby capturing absolute casing displacement and seismic velocity anomalies on rotating machinery shafts and bearings.

Hardware Specifications

Mechanical Monitoring and TSI Characteristics

Engineers designed the internal moving-coil mechanism to optimize cross-talk suppression and eliminate signal degradation across multi-axis installations on a single bearing housing. While proximity installations require specific gap voltage validation (-10 VDC targets) for eddy-current probe scaling, this seismic transducer operates on electromagnetic velocity principles to capture macro-level casing responses. Consequently, it records structural low-frequency rotor dynamics that proximity probes cannot detect independently, providing mechanical data to identify unbalance, misalignment, and structural looseness across large industrial assets.

Frequently Asked Questions

Q: What is the primary functional difference between the 16699-03 Seismoprobe and a standard solid-state Velomitor sensor? A: The 16699-03 utilizes an electro-mechanical moving-coil mechanism that requires 0 mA external excitation power to generate a voltage signal. In contrast, Velomitors are solid-state piezoelectric transducers that require an external constant current source to operate.

Q: Are there specific mounting orientation restrictions for the 16699-03 transducer? A: Yes, the module configuration dictates its axis. Plant personnel must order and install the unit to match its internal spring calibration, supporting specific vertical, horizontal, or angled configurations to prevent physical travel limitation of the internal coil mass.

Field Installation Guidelines

During deployment, ensure proper signal isolation by routing the two-wire twisted pair cabling through dedicated rigid or flexible conduit. Furthermore, installers must route the conduit away from high-voltage AC three-phase power lines to prevent electromagnetic induction interferences. Maintain cable shield integrity from the housing to the termination block inside the monitor rack, and ground the outer shield at one single point only, preferably at the instrument rack ground bar. Finally, ensure full mechanical thread engagement (5 standard NPT turns) when locking the base mount to prevent loose housing resonances from skewing the high-frequency vibration signal spectrum.