Description
Bently Nevada 3300/20-13-02-01-00-00 Dual Thrust Position Monitor
Configured for axial shaft displacement measurement in the Bently Nevada 3300 system, the Bently Nevada 3300/20-13-02-01-00-00 (3300/20 Dual Thrust Position Monitor) provides direct physical execution of dual-channel proximity probe signal processing and alarm relay actuation.
Suffix Breakdown & Model Matrix
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Option Code
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Description
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Specification
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3300/20
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Product Type
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Dual Thrust Position Monitor
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-13
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Full-scale Range
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2.0 - 0 - 2.0 mm
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-02
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Transducer Input
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7200 / 11 mm Proximitor System (100 mV/mil)
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-01
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Alarm Relay Option
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Epoxy-sealed relays
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-00
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Agency Approval
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Not required / Standard
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-00
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Safety Barrier 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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1.0 kg (2.2 lbs)
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Dimensions
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9.50" x 4.50" x 1.00"
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Operating Temp
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0 degC to +65 degC
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Storage Temp
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-40 degC to +85 degC
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Power Consumption
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7.7 W
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Input Impedance
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100 Ohm
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Transducer Supply
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-24 Vdc
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Eddy-Current Probe Scaling and Gap Validation
The module is scaled for 100 mV/mil sensitivity to match the 7200 11mm proximity system. Calibration must verify that static probe mounting achieves a nominal -10 Vdc gap voltage to center the linear range around the mechanical zero position. Incorrect scaling will result in erroneous axial displacement readouts and false clearance calculations during rotor dynamics analysis.
Frequently Asked Questions
Q: Is this module compatible with 3300 XL 8mm proximity probes?
A: No. The -02 option specifies compatibility with the 7200 / 11 mm Proximitor system. Using 3300 XL probes will result in incorrect scaling and measurement errors.
Q: What is the function of the epoxy-sealed relays (-01 option)?
A: Epoxy-sealed relays provide enhanced environmental resistance against contaminants such as dust and moisture compared to standard relays, suitable for harsh industrial enclosures.
Q: How does the module handle single transducer failures?
A: When utilizing AND voting logic with both channels, the loss of one signal prevents a false trip. The monitor relies on the remaining valid channel for continued operation until maintenance occurs.
Field Installation Guidelines
Mount the module in any available I/O slot within the 3300 rack. Ensure the -24 Vdc transducer supply wiring uses shielded twisted pair cable, with the shield terminated at the rack ground bus. Verify probe gap voltage at installation to confirm the target -10 Vdc setpoint before applying power to the monitor.
