140734-01 Differential Expansion/Axial Position Monitor

Outputs and Front Panel Indicators for 140734-01:

Front Panel LEDs:

1. OK LED:
   • Indicates proper operation of the 3500/42M.
2. TX/RX LED:
   • Indicates communication status with other modules in the 3500 rack.
3. Bypass LED:
   • Indicates activation of Bypass Mode in the 140734-01.

Buffered Transducer Outputs:

• Each monitor features a coaxial connector for every channel, offering short-circuit protection.
• Output Impedance: 550 Ω
• Transducer Power Supply: -24 Vdc
• Recorder Output: +4 to +20 mA. Proportional values to monitor full-scale, unaffected by short circuits.

Voltage Compliance (Current Output):

• 0 to +12 Vdc range across load with load resistance from 0 to 600 Ω.
• Resolution: 0.3662 µA per bit.
• Error Rate: ±0.25% at room temperature, ±0.7% over temperature range.
• Update Rate: 100 ms or less.

Shaft Absolute Buffered Outputs:

• One output per channel group, each protected against short circuits.
• Output Impedance: 300 Ω

Signal Conditioning for Radial Vibration:

• Frequency Response:
  • Direct filter: User-programmable, 4 Hz to 4000 Hz or 1 Hz to 600 Hz.
  • Gap filter: -3 dB at 0.09 Hz.
  • Not 1X filter: 60 cpm to 15.8 times running speed. Constant Q notch filter. Minimum rejection in stopband of -34.9 dB.
  • Smax: 0.125 to 15.8 times running speed.
  • 1X and 2X Vector filter: Constant Q Filter. Minimum rejection in stopband of -57.7 dB.
• Accuracy:
  • Direct and Gap: Within ±0.33% of full-scale typical, ±1% maximum.
  • 1X and 2X: Within ±0.33% of full-scale typical, ±1% maximum.
  • Smax: Within ±5% maximum.
  • Not 1X: ±3% for machine speeds less than 30,000 cpm, ±8.5% for machine speeds greater than 30,000 cpm.

Note: Specifications are valid for machine speeds of 60 cpm to 60,000 cpm.