Bently Nevada 3500/64M 176449-05 Dynamic Pressure Monitor
A single-slot machinery-protection monitor for one to four high-temperature pressure-transducer inputs.
Overview
3500/64M 176449-05 is the main monitor module for the Bently Nevada 3500/64M Dynamic Pressure Monitor. It conditions as many as four pressure-transducer inputs and drives alert and danger decisions from bandpass dynamic pressure.
Filter corner frequencies, line-frequency rejection and full-scale values are configured in 3500 Rack Configuration Software, making the saved rack database part of the replacement record.
Specs
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Spare Part Number | 176449-05 |
| Rack Family | 3500 Machinery Protection System |
| Module Format | Single-slot, four-channel monitor |
| Accepted Inputs | One to four pressure-transducer signals |
| Measured Variable | Bandpass dynamic pressure |
| Dynamic Pressure Sensitivity | 100 mV/psi (1.45 mV/mbar) |
| Low Filter Mode | 5 Hz to 4 kHz; approximately 5.285 kHz without LP selection |
| High Filter Mode | 10 Hz to 14.75 kHz |
| Recorder Outputs | Individual +4 to +20 mA values for each channel |
| Buffered Outputs | One short-circuit-protected coaxial connector per channel |
Features
- Alert and danger setpoints are independently configurable for each active measured variable.
- Selectable 50 or 60 Hz notch filtering helps reject line-frequency interference.
- Cascade mode can route channel 1 input through four different filter and full-scale arrangements.
- Front-panel OK, TX/RX and Bypass indicators expose operating and communication state.
Applications
- Combustion dynamic-pressure monitoring on gas-turbine systems.
- Machinery protection using high-temperature pressure transducers.
- Operations and maintenance trending through recorder outputs and buffered channel access.
Lifecycle
- Archive the rack configuration before removing the module.
- Record the I/O module type, termination location and every transducer wiring assignment.
- Verify paired-channel filter-mode constraints when restoring configuration.
- Function-test buffered outputs, recorder loops, alert setpoints, danger setpoints and bypass handling.
FAQ
Is 3500/64M 176449-05 supplied with an I/O termination module?
Treat the monitor and I/O module as separate spares; confirm whether the installed system uses internal, external or cylinder-pressure termination.
What configuration file is needed for 3500/64M 176449-05?
Retain the current 3500 rack database, including filter corners, full scale, notch selection, setpoints, recorder scaling and cascade settings.
Can all four channels of 3500/64M 176449-05 use unrelated filter modes?
Channels operate as pairs: 1–2 and 3–4. Each pair must share low or high filtering mode even though bandpass selections can differ.
When is cascade mode useful on 3500/64M 176449-05?
It allows one transducer input to feed four channels with separate bandpass and full-scale selections for multi-band pressure analysis.
What should be verified after installing 3500/64M 176449-05?
Check rack communication, channel OK states, transducer supply, buffered signals, recorder outputs and every configured alarm action.
What information should accompany an enquiry for 3500/64M 176449-05?
Provide the rack slot, I/O part number, transducer types, current configuration backup and required certification or test records.
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