Description

Bently Nevada 3300/15-03-01-01-00-00-00 Dual Vibration Monitor

The Bently Nevada 3300/15-03-01-01-00-00-00, also cataloged as the 3300/15 Dual Vibration Monitor, operates as a dedicated hardware component for continuous radial vibration measurement across dual Proximitor channels within the 3300 Machinery Monitoring System. It provides real-time signal acquisition, relay actuation, and 4-20 mA recorder output for industrial machinery monitoring loops.

Hardware Specifications

Parameter	Specification
ModelBrand	Bently Nevada
Origin	United States
Weight	1.0 kg (2.2 lbs)
Dimensions	221 mm x 24.4 mm x 295 mm
OperatingTemp	0 degC to 65 degC
StorageTemp	-40 degC to 85 degC
RelativeHumidity	Up to 95% non-condensing
PowerConsumption	6 W typical
SignalInput	2 independent proximity probe channels
InputImpedance	>10 kOhm
FrequencyResponse	4 Hz to 5 kHz (-3 dB)
FullScaleRange	0-5 mils pp
AlarmOutputs	Alert and Danger SPDT relays, 5 A @ 120 VAC / 28 VDC
RecorderOutput	4-20 mA DC proportional to full scale
Display	4-digit LCD with backlight
LEDIndicators	OK (green), ALERT (yellow), DANGER (red), BYPASS (red)

Rotordynamics & Eddy-Current Probe Scaling

The monitor supports eddy-current probe scaling with configurable millivolt-per-unit displacement calibration. Gap voltage validation is maintained at -10 VDC targets to ensure rotor displacement linearity. Cross-talk suppression circuitry reduces signal interference between adjacent channels, supporting precise vibration measurement for high-speed rotating machinery and dynamic imbalance detection.

Frequently Asked Questions

Q: What is the maximum loop current for recorder output?
A: The recorder output supports standard 4-20 mA DC current proportional to the configured full-scale vibration range. No additional amplification is required.

Q: Can the 3300/15 be hot-swapped in a live 3300 rack?
A: The monitor requires powering down the rack slot before replacement. It is not designed for hot-swap operation.

Q: How does the monitor respond to sensor failure or gap loss?
A: The OK LED will turn off, and both Alert and Danger relays will default according to preprogrammed safe-state configuration.

Field Installation Guidelines

1. Mount the unit in a standard 3300 single-slot rack with proper mechanical fastening.
2. Ensure proximity probe cabling is shielded and grounded at one end only to avoid ground loops.
3. Maintain separation from high-current power cables to minimize EMI pickup.
4. Connect relay outputs to dry-contact circuits rated for 5 A maximum; avoid exceeding voltage or current ratings.
5. Verify that the 4-20 mA loop is configured for the correct full-scale range and polarity.
6. Avoid inserting the unit while the rack is energized; use static protection measures when handling connectors.
7. Periodically inspect BNC transducer outputs and internal connections for corrosion or loose terminations.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems