Bently Nevada™ 3500/42 176449-02 Proximitor Seismic Monitor
Description
The Bently Nevada™ 3500/42 176449-02 Proximitor Seismic Monitor provides critical machinery protection by continuously comparing monitored parameters against configured alarm setpoints to trigger alarms. It facilitates seamless communication of essential machine information to both operations and maintenance personnel.
As a four-channel monitor, it accepts inputs from proximity and seismic transducers. The unit conditions these signals to deliver precise vibration and position measurements, then compares the processed signals with user-programmable alarm thresholds.
Via the 3500 Rack Configuration Software, each channel can be programmed to monitor and report the following parameters:
Radial vibration
Acceleration
Eccentricity
REBAM
Differential expansion
Circular acceptance region
Thrust position
Shaft absolute
Velocity
Shaft absolute (radial vibration)
Shaft absolute (direct)
Shaft absolute (velocity)
Monitor channels are configured in pairs, with each pair capable of performing up to two of the listed functions simultaneously. For instance, Channels 1 and 2 can execute one function while Channels 3 and 4 operate on another (or the same) function.
Depending on configuration, each channel typically conditions its input signal to generate various parameters referred to as static values. Users can set alert setpoints for every active static value, as well as danger setpoints for any two of the active static values.
Specifications
Inputs
Signal: Accepts 1 to 4 proximity, velocity, or acceleration transducer signals
Power Consumption: 7.7 watts (typical)
Input Impedance (Standard I/O): 10 kΩ (for Proximitor and acceleration inputs)
Sensitivity:
Radial Vibration: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)
Thrust: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)
Eccentricity: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)
Differential Expansion: 0.394 mV/μm (10 mV/mil) or 0.787 mV/μm (20 mV/mil)
REBAM: 40 mV/μm (1000 mV/mil) or 80 mV/μm (2000 mV/mil)
Acceleration & Acceleration²: 10 mV/(m/s²) (100 mV/g)
Velocity & Velocity²: 20 mV/(mm/s) pk (500 mV/(in/s) pk) / 5.8 mV/(mm/s) pk (145 mV/(in/s) pk) / 4 mV/(mm/s) pk (100 mV/(in/s) pk)
Shaft Absolute (Radial Vibration): 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)
Shaft Absolute (Direct): 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)
Shaft Absolute (Velocity): 20 mV/(mm/s) pk (500 mV/(in/s) pk) / 5.8 mV/(mm/s) pk (145 mV/(in/s) pk) / 4 mV/(mm/s) pk (100 mV/(in/s) pk)
Outputs
Front Panel LEDs:
OK LED: Indicates proper operation of the 3500/42 176449-02 Proximitor Seismic Monitor
TX/RX LED: Indicates active communication between the 3500/42 176449-02 Proximitor Seismic Monitor and other modules in the 3500 rack
Bypass LED: Indicates when the 3500/42 176449-02 Proximitor Seismic Monitor is in Bypass Mode
Buffered Transducer Outputs: One coaxial connector per channel on the front panel; each connector features short-circuit protection
Output Impedance: 550 Ω
Transducer Power Supply: -24 Vdc
Recorder: +4 to +20 mA (values proportional to monitor full-scale); individual recorder values provided for each channel; monitor operation unaffected by short circuits on recorder outputs
Voltage Compliance (Current Output): 0 to +12 Vdc range across load; load resistance: 0 to 600 Ω
