BENTLY 3500/42M-01-00

Description

The 3500/42M Proximitor/Seismic Monitor is a 4-channel monitor that accepts
input from proximity and seismic transducers, conditions the signal to provide
various vibrations and position measurements, and compares the conditioned
signals with user-programmable alarms. The user can program each channel of
the 3500/42M using the 3500 Rack Configuration Software to perform any of the
following functions:
• Radial Vibration
• Thrust Position
• Differential Expansion
• Eccentricity
• REBAM*
• Acceleration
• Velocity
• Shaft Absolute
• Circular Acceptance Region
Note: The monitor channels are programmed in pairs and can perform up to two of these functions
at a time. Channels 1 and 2 can perform one function, while channels 3 and 4 perform another (or
the same) function.
The primary purpose of the 3500/42M monitor is to provide:
1. Machinery protection by continuously comparing monitored parameters
against configured alarm setpoints to drive alarms.
2. Essential machine information for both operations and maintenance
personnel.
Each channel, depending on configuration, typically conditions its input signal to
generate various parameters called “static values”. The user can configure Alert
setpoints for each active static value and Danger setpoints for any two of the
active static values.

Specifications
Inputs
Signal
Accepts from 1 to 4 proximity,
velocity or acceleration
transducer signals.
Input
Impedance
Standard I/O
10 kΩ (Proximitor and
Acceleration Inputs).
TMR I/O
The effective impedance of three
Bussed TMR I/O channels wired in
parallel to one transducer is 50
kΩ.
Power
Consumption
7.7 Watts, typical.
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).