Description
Bently Nevada 3300/36 Dual Temperature Monitor
Configured for dual-point temperature acquisition in the Bently Nevada 3300 Machinery Monitoring System, the Bently Nevada 3300/36, also referenced as the 3300/36 Dual Temperature Monitor, executes direct signal conversion from RTD or thermocouple inputs into proportional analog outputs for machinery protection logic.
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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0.8 kg
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Dimensions
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Two-slot width in standard 3300 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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Supplied via 3300 backplane
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Number of Channels
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2
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Input Sensor Types
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RTD: 100 ohm Pt, Copper, Nickel; TC: Type J, K, E, T
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Recorder Outputs
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4-20 mA DC or 1-5 Vdc per channel
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Buffered Outputs
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Not provided
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Relay Configurations
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Shared or Quad Relays, programmable NO/NC, latching/non-latching
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Display
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7-segment LCD, OK/Alert/Danger LEDs
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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 3300/36 supports integration with eddy-current probe systems for rotor thermal expansion tracking, requiring precise probe scale factor alignment during installation. Gap voltage validation targets a nominal -10 VDC bias to ensure linear temperature correlation with shaft displacement measurements. Cross-talk suppression measures are implemented in the signal conditioning stage to maintain measurement integrity in high-electrical-noise environments typical of turbine generator sets.
Frequently Asked Questions
Q: Does the 3300/36 support hot-swap replacement without interrupting rack power?
A: No. Removal or insertion must occur with the rack de-energized to prevent transient backplane faults.
Q: What is the minimum clearance required around the module for ventilation?
A: Maintain at least 25 mm of unobstructed airflow space above and below the installed module.
Q: Are the relay contacts rated for inductive loads without suppression?
A: No. External suppression components are mandatory when switching inductive loads to prevent contact welding.
Field Installation Guidelines
Mount the module in an approved 3300 rack slot pair ensuring correct alignment with guide rails. Torque mounting screws to manufacturer specification. Use shielded twisted-pair cable for RTD and TC wiring, grounding the shield at the rack ground bus only. Verify all field wiring terminations are tightened to prevent thermal drift errors. Before energizing, confirm sensor type selection matches the ordered configuration to avoid incorrect scaling.
