Description
Bently Nevada 3300/35-12-01-01-00-00 Six-Channel Radial Vibration / Thrust Position Monitor
Configured for shaft radial vibration and thrust position measurement in the Bently Nevada 3300 monitoring system, the Bently Nevada 3300/35-12-01-01-00-00 (base model 3300/35) provides direct signal conditioning and relay drive execution for machinery protection loops.
Suffix Breakdown & Model Matrix
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Option Code
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Description
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Function
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3300/35
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Product Type
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Six-Channel Radial Vibration / Thrust Position Monitor
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-12
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Channel Configuration
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Two Thrust channels, Four Radial Vibration channels
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-01
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Full-Scale Range Option
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Standard full-scale ranges for radial and thrust measurements
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-01
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Agency Approval Option
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CSA / NRTL / C (Class I, Div 2, Groups A–D)
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-00
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Safety Barrier Option
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None
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-00
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Modbus/Comms Option
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None
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Hardware Specifications
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Parameter
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Specification
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Brand
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Bently Nevada
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Origin
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United States
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Weight
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1.13 kg
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Dimensions
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241 mm x 50 mm x 290 mm
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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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7.5 W from 3300 backplane supply
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Input Impedance
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10 kOhm
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Buffered Output Impedance
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100 Ohm
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Recorder Outputs
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4-20 mA or 1-5 Vdc (jumper selectable)
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Alarm Setpoints
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0–100% of full scale, Alert and Danger independently adjustable
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Alarm Delay
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0.1, 1, 3, or 6 sec (jumper selectable)
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Relative Humidity
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Up to 95%, non-condensing
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Eddy-Current Probe Scaling and Gap Voltage Validation
The monitor interfaces directly with Bently Nevada eddy-current proximity transducers, requiring precise probe scaling to match target material properties. Calibration must ensure that gap voltage targets remain near -10 VDC under static shaft conditions to maintain linear displacement measurement and minimize rotor dynamics errors. Cross-talk suppression is implemented through shielded twisted-pair wiring and isolated grounding points at the rack frame.
Frequently Asked Questions
Q: Can the 3300/35 be hot-swapped in a live rack?
A: No. The module must be installed or removed only when the rack power is disconnected to prevent backplane transient damage.
Q: What is the maximum cable length between probe and monitor?
A: For standard 3300 5 mm and 8 mm probes, total extension cable length should not exceed 305 m to preserve signal integrity.
Q: Does the -00 safety barrier option affect recorder output performance?
A: No. The absence of internal safety barriers removes intrinsic safety isolation but does not alter electrical output characteristics.
Field Installation Guidelines
Mount the module in a single 3300 rack slot with proper EMC clearance from high-power conductors. Use continuous shield termination at both ends of transducer cables, bonded to rack ground. Verify gap voltage before energizing the system to ensure mechanical clearance compliance. Route signal wiring separately from power conductors to reduce electromagnetic interference.
