Overview
The Bently Nevada 3300/25, also cataloged as the 3300/25 Dual Accelerometer Monitor, operates as a dedicated hardware component for accelerometer signal measurement within the Bently Nevada 3300 Series Machinery Monitoring System.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3300/25 |
| Brand | Bently Nevada |
| Product Type | Dual Accelerometer Monitor |
| Series | 3300 Series |
| Origin | USA |
| Weight | 2 lbs (1.13 kg) |
| Dimensions | 6 x 20 x 33.0 cm estimated shipping size |
| Operating Temp | 0 deg C to +65 deg C (+32 deg F to +150 deg F) |
| Storage Temp | -40 deg C to +85 deg C (-40 deg F to +185 deg F) |
| Relative Humidity | Up to 95%, noncondensing |
| Power Consumption | Not specified in available documentation |
| Tariff Code | 8537101190 |
| Input Type | Dual accelerometer input channels |
| Sensitivity | 100 mV/g (10 mV per m/s2) |
| Output Impedance | 100 ohm |
| Frequency Range Without Filter | 2.7 Hz to 90 kHz, -3 dB nominal |
| Frequency Range With Integration | 10 Hz to 90 kHz |
Rotor Dynamics Signal Processing and Vibration Measurement
The Bently Nevada 3300/25 processes accelerometer signals for dynamic machinery vibration monitoring applications. It measures two independent accelerometer channels and converts vibration acceleration signals into conditioned outputs for the 3300 Series monitoring architecture.
The module supports frequency measurement from 2.7 Hz to 90 kHz without filtering. In addition, the integrated signal processing range extends from 10 Hz to 90 kHz when acceleration integration functions are applied.
The monitor uses a 100 mV/g sensitivity input structure to maintain consistent vibration measurement scaling. Therefore, it can interface with compatible accelerometer sensors while preserving signal accuracy across the configured frequency range.
For machinery diagnostics, the module supports rotor dynamics analysis by providing vibration data associated with rotating equipment behavior. The signal path design also reduces unwanted interaction between measurement channels to maintain independent channel operation.
Frequently Asked Questions
Q: What type of vibration signals does the Bently Nevada 3300/25 measure?
A: The 3300/25 measures acceleration signals from two independent accelerometer channels and provides conditioned vibration monitoring data for the 3300 Series system.
Q: What is the operating temperature range of the 3300/25 module?
A: The module operates from 0 deg C to +65 deg C and supports storage temperatures from -40 deg C to +85 deg C.
Q: Does the 3300/25 use eddy-current probe scaling?
A: No. The 3300/25 is an accelerometer monitor. Eddy-current probe scaling and gap voltage validation functions apply to proximity monitoring modules rather than this accelerometer input module.
Field Installation Guidelines
Install the 3300/25 module inside a compatible Bently Nevada 3300 Series rack according to system configuration requirements.
Connect accelerometer field wiring using proper shielded cable practices to reduce electrical noise interference. Ground cable shields according to the site grounding design and avoid routing vibration signal cables near high-current power conductors.
Verify accelerometer polarity and wiring continuity before commissioning. Confirm that the input signal level matches the configured sensor sensitivity to prevent incorrect vibration scaling.
Before operation, check channel status, signal response, and alarm configuration through the connected monitoring system. Maintain proper rack ventilation and follow the environmental limits specified for the module.
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