Overview

The 3500/42 Proximitor/Seismic Monitor is a four-channel device that accepts input from Proximitor and Seismic Transducers. It utilizes this input to activate alarms and can be programmed using the 3500 Rack Configuration Software to perform various functions, including:

• Radial Vibration
• Thrust Position
• Eccentricity
• Differential Expansion
• Acceleration
• Velocity

Specifications

Inputs

• Signal: Accepts 1 to 4 signal inputs.
• Input Impedance:
  • Standard I/O: 10 kΩ
  • TMR I/O:
    • Bussed Transducer Configuration: 50 kΩ
    • Discrete Transducer Configuration: 150 kΩ
• Power: Nominal consumption of 7.7 watts
• Sensitivity:
  • Radial Vibration:
    • 3.94 mV/µm (100 mV/mil)
    • 7.87 mV/µm (200 mV/mil)
  • Thrust:
    • 3.94 mV/µm (100 mV/mil)
    • 7.87 mV/µm (200 mV/mil)
  • Eccentricity:
    • 3.94 mV/µm (100 mV/mil)
    • 7.87 mV/µm (200 mV/mil)
  • Differential Expansion:
    • 0.394 mV/µm (10 mV/mil)
    • 0.787 mV/µm (20 mV/mil)
  • Acceleration: 10 mV/(m/s²) (100 mV/g)
  • 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.
  • TX/RX LED: Indicates communication with other modules in the 3500 rack.
  • Bypass LED: Indicates when the 3500/42 is in Bypass Mode.
• Buffered Transducer Outputs: Each channel has one coaxial connector, which is short circuit protected.
• Output Impedance: 550 Ω
• Transducer Supply Values: -24 Vdc
• Recorder Output: +4 to +20 mA (values proportional to monitor full scale). Individual values provided for each channel, unaffected by short circuits on outputs.
• Voltage Compliance (current output): 0 to +12 Vdc across load (0 to 600 Ω).
• Resolution: 0.3662 µA per bit
• Accuracy:
  • ±0.25 % error at room temperature
  • -0.66 to +0.70 % error over temperature range
  • Updated rate: 100 ms or less

Signal Conditioning

• Specified at +25° C (77° F)

• Radial Vibration:

  • Frequency Response:
    • Direct Filter: User-programmable for 4 to 4,000 Hz
    • Gap Filter: -3 dB at 0.09 Hz
    • Not 1X Filter: 60 cpm to 16 times running speed
    • Smax: 0.125 to 16 times running speed
    • 1X & 2X Vector Filter: Minimum rejection in stopband of -57.7 dB
  • Accuracy:
    • Direct and Gap: ±0.33 % of full scale typical, ±1 % maximum
    • 1X & 2X: ±0.33 % of full scale typical, ±1 % maximum
    • Smax: ±5 % maximum
    • Not 1X: ±3 % for machine speeds <30,000 cpm; ±8.5 % for >30,000 cpm

• Thrust and Differential Expansion:

  • Frequency Response:
    • Direct Filter: -3 dB at 1.2 Hz
    • Gap Filter: -3 dB at 0.41 Hz
  • Accuracy: ±0.33 % of full scale typical, ±1 % maximum

• EIPP Monitor:

  • Frequency Response:
    • Direct Filter: -3 dB at 15.6 Hz
    • Gap Filter: -3 dB at 0.41 Hz
  • Accuracy: ±0.33 % of full scale typical, ±1 % maximum