Description
Bently Nevada 3300/16-12-01-03-00-00-00 XY/GAP Dual Vibration Monitor
Configured for continuous radial shaft vibration measurement and shaft position monitoring in the 3300 Machinery Protection System, the Bently Nevada 3300/16-12-01-03-00-00-00 (3300/16 XY/GAP Dual Vibration Monitor) processes eddy-current probe signals into calibrated AC vibration amplitude and DC gap voltage values for deterministic machinery protection logic execution.
Suffix Breakdown & Model Matrix
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Option
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Description
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3300/16
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XY/GAP Dual Vibration Monitor Module
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-12
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Full-scale range: 0 - 150 um peak-to-peak
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-01
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Transducer input: 3300 8 mm, 3300 XL 8 mm, or 7200 5 mm/8 mm Proximitor Sensor (200 mV/mil or ~7.87 V/mm)
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-03
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Alarm relay option: Quad Relay, epoxy-sealed
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-00
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Agency approval: Not required
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-00
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Safety barrier option: None
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-00
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Trip multiply option: None
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-00
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Reserved/special: Standard factory configuration
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Hardware Specifications
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Parameter
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Specification
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Model Brand
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Bently Nevada
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Origin
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USA
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Weight
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0.45 kg (estimated)
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Dimensions
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Single slot width, compatible with 3300/05 rack
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Operating Temp
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0 degC to +65 degC
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Power Consumption
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5 W typical
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Input Impedance
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10 kohm
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Frequency Response
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4 Hz to 4000 Hz (-3 dB nominal)
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Accuracy
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+/-0.33% of full scale at +25 degC
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Recorder Outputs
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Configurable 4-20 mA, 0 to -10 Vdc, +1 to +5 Vdc
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Buffered Output Impedance
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100 ohm
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Alarm Relays
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Four independent relays (Alert/Danger per channel)
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Eddy-Current Probe Scaling and Gap Voltage Validation
The 3300/16 performs linear scaling of eddy-current probe displacement signals based on factory-calibrated coefficients stored in non-volatile memory. Gap voltage validation compares the DC bias against a target reference of -10 VDC for 3300 XL 8 mm probes, enabling detection of probe tip wear, lift-off, or shorted loops prior to machinery start-up. Cross-talk suppression between Channel A and Channel B is implemented via independent signal conditioning paths to maintain rotor dynamic fidelity during transient events.
Frequently Asked Questions
Q: Can the 3300/16 be hot-swapped in a powered 3300/05 rack?
A: No. Remove power from the rack before inserting or removing the module to prevent backplane contact damage and transient signal errors.
Q: What is the minimum probe gap voltage required for valid OK status?
A: For 3300 XL 8 mm probes, the acceptable range is approximately -7 VDC to -14 VDC, centered on -10 VDC; deviations outside this window assert the OK LED fault indication.
Q: Does the quad relay configuration support isolated alarm circuits?
A: Yes. Each of the four relays has independent Form C contacts, allowing separate routing of Alert and Danger signals without shared commons.
Field Installation Guidelines
Mount the 3300/16 in any available slot of a grounded 3300/05 rack. Use shielded twisted-pair cable for proximity probe runs, terminating shield drains directly to rack ground lugs. Maintain separation of probe cables from high-voltage AC conductors by at least 300 mm to reduce electromagnetic interference. Verify gap voltage at installation using the front-panel center LCD before enabling alarms. Ensure all relay wiring uses crimped terminals with proper torque to prevent contact heating under load.
