Configured for vibration signal conditioning in machinery monitoring loops, the Bently Nevada 990-05-XX-01-00 MOD:165335-01 (990-05-XX-01-00) vibration transmitter provides direct physical/electrical execution. The unit interfaces with a Bently Nevada 3300 NSv proximity probe system, converting eddy-current gap displacement input into a proportional 4-20 mA output representing peak-to-peak vibration amplitude.
Eddy-Current Probe Scaling & Gap Voltage Validation
The transmitter performs eddy-current signal conditioning aligned with proximity probe linearization characteristics. Input gap voltage is scaled to a calibrated displacement reference, maintaining validation against nominal -10 VDC operating targets for probe driver linear region compliance. Signal integrity relies on controlled impedance matching between probe, extension cable, and transmitter input stage. Cross-talk suppression is implemented through internal filtering to preserve rotor dynamic measurement fidelity under multi-channel proximity monitoring configurations.
Frequently Asked Questions
Q1: Does the module accept direct vibration accelerometer input? A1: No. The device is designed exclusively for eddy-current proximity probe systems (Bently Nevada 3300 NSv) and does not support IEPE or accelerometer inputs.
Q2: What is the output signal format to the control system? A2: The transmitter provides a loop-powered 4-20 mA analog signal proportional to peak-to-peak shaft vibration displacement.
Q3: Is the system length selectable in the field? A3: No. System length selection (5.0 m or 7.0 m) is defined by model configuration and must match probe and extension cable assembly at installation.
Field Installation Guidelines
Install on a standard 35 mm DIN rail with secure mechanical retention of clip interface.
Maintain separation between probe signal wiring and high-voltage conductors to reduce electromagnetic coupling.
Ensure proper shielding termination at designated ground reference point; avoid multiple ground loops in signal return path.
Verify correct matching of probe, extension cable, and transmitter configuration code prior to energization.
Observe linear operating region of proximity probe driver to prevent saturation-induced measurement distortion.
