Description
Bently Nevada 3300/30 Six-Channel Temperature Monitor
The Bently Nevada 79502-01, also cataloged as the 3300/30 Six-Channel Temperature Monitor, operates as a dedicated hardware component for continuous thermal surveillance within the 3300 series machinery protection system.
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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Approx. 0.5 kg
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Dimensions
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Standard single-slot 3300 rack module
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Operating Temp
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-30 degC to +65 degC
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Power Consumption
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< 8 W
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Input Types
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RTD: 100 Ω Pt, 10 Ω Cu, 120 Ω Ni; TC: Type J, K, T, E
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Resolution
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1 degC / 1 degF
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Accuracy
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RTD: ±1 degC or ±0.5% of span; TC: ±2 degC plus CJ error
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Update Rate
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< 1 s for all 6 channels
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Alarm Setpoints
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Independent Alert and Danger per channel
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Relay Integration
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Via 3300 relay modules
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Recorder Outputs
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4-20 mA or 1-5 Vdc
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Isolation
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Galvanic between channels and system power
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Eddy-Current Probe Scaling and Gap Voltage Validation
In rotor dynamics applications, the 3300/30 supports scaling parameters consistent with eddy-current proximity probe systems. Gap voltage validation targets a nominal -10 VDC bias point to confirm probe seating and avoid false trip conditions. Cross-talk suppression is implemented between input channels to maintain signal fidelity in high-vibration environments.
Frequently Asked Questions
Q: Can the 3300/30 be hot-swapped without shutting down the rack?
A: No. The module must be installed or removed only when system power is de-energized to prevent backplane damage and ensure configuration integrity.
Q: What is the minimum clearance required around the module for cooling?
A: Maintain at least 25 mm of unobstructed airflow space above and below the rack slot to comply with thermal dissipation requirements.
Q: Are RTD and TC inputs configurable per channel independently?
A: Yes. Each channel can be independently configured for either RTD or TC operation via software setup and wiring termination.
Field Installation Guidelines
Mount the module in an approved Bently Nevada 3300 rack using correct keying and latching. Ensure shield connections are grounded once only at the rack earth terminal to prevent ground loops. Verify all field wiring against the terminal block diagram prior to energizing. Use twisted-pair cable for TC runs to minimize induced noise. Confirm sensor calibration offsets before commissioning.
