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The 3500/42M is a Proximitor Seismic Monitor component developed by Bently Nevada. It is a four-channel monitor with proximity and seismic sensor inputs. It compares the conditioned signal to a user-programmable alarm and conditions the signal to produce vibration and position readings. The 3500 Rack Configuration Software can be used to program each channel to monitor and report radial vibration, thrust position, REBAM, acceleration, differential expansion, eccentricity, velocity and other parameters.

3500/42M Technical Features

enter
Accepts signals from one to four proximity, acceleration, or speed sensors.
Power consumption 7.7 watts.

output
The OK LED is on when the Monitor module is functioning normally.
The TX/RX LED illuminates when the Seismic Monitor module is connected to other modules in the 3500 rack.
The Bypass LED will illuminate if the Seismic Monitor is in bypass mode.
Buffer Sensors: Each channel has its own coaxial connector on the front of the monitor. Each connector has built-in short-circuit protection.
550 ohm output impedance
Axis power supply -24 Vdc
Resolution 0.3662A/bit
Sensor power supply -24 Vdc
Absolute output impedance 300 ohms

radial vibration
User Programmable Direct Filter
Single pole, -3db, 4 Hz to 4000 Hz or 1 Hz to 600 Hz, 1% accuracy
Gap Filter: 0.09 Hz, -3 dB
Not a 1X filter: Constant Q notch filter with -34.9 dB minimum rejection in stopband, 60 cpm to 15.8 times faster run
Smax varies between 0.125 and 15.8 times the operating speed.
1X and 2X vector filters: Constant-Q filters with -57.7 dB minimum stopband rejection

Bently Nevada products