3500-42M BENTLY
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 adjusted signal to a user programmable alarm and adjusts 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, speed, and other parameters.
3500/42M Features
Monitoring channels are set in pairs and can perform up to two specified functions simultaneously. For example, channels 1 and 2 can perform one function, while channels 3 and 4 perform another or the same function.
The Proximitor Seismic Monitor protects machinery by comparing monitoring parameters with selected alarm setpoints in real time and triggering alarms. It informs operating and maintenance personnel about critical machine information.
Depending on the arrangement, each channel typically adjusts its input signal to produce a set of static values. You can establish alarm setpoints for any current static value, or you can set danger setpoints for any two of them.
Use the rack configuration software to set the alarm level for any value measured by the monitor, and set the danger setpoint for any two values measured by the monitor. The alarm can be set to 0 to 100% of full scale for each measured value. When the full scale range exceeds the range of the sensor, the set point is limited by the sensor range.
3500/42M Technical Features
input
Receives signals from one to four proximity, acceleration, or speed sensors.
Power consumption 7.7 watts.
produce
When the Monitor module is operating normally, the OK LED illuminates.
The TX/RX LED illuminates when the Seismic Monitor module is connected to other modules in the 3500 rack.
If the seismic monitor is in bypass mode, the bypass LED will illuminate.
Buffer sensor: Each channel has its own coaxial connector in front of the display. Each connector has built-in short circuit protection.
550 ohm output impedance
Shaft power supply – 24 Vdc
Resolution 0.3662A/bit
Sensor power supply – 24 Vdc
Absolute output impedance 300 ohms
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 adjusted signal to a user programmable alarm and adjusts the signal to produce vibration and position readings.
signal processing
Temperature: 25 degrees Celsius
Radial vibration
User programmable direct filter
Single pole, – 3 db, 4 Hz to 4000 Hz or 1 Hz to 600 Hz, 1% accuracy
Gap filter: 0.09 Hz, – 3 dB
Non 1X filter: Constant Q-notch filter with a minimum rejection in the stopband of – 34.9 dB, 60 cpm to 15.8 times the operating speed
Smax varies between 0.125 and 15.8 times the operating speed.
1X and 2X vector filters: Constant Q-value filters with a minimum rejection of – 57.7 dB in the stopband
accuracy
Gap and Direct: Filtering is not included within 0.33% of full scale
1X and 2X: within 0.33% of the normal maximum of 1% of full scale
Differential expansion and thrust
Within 0.33% of full scale accuracy
3500/42M Alarm
Use the rack configuration software to set alert thresholds for any value measured by the monitor, and set danger setpoints for any two of these values.
