Overview

The 990 Vibration Transmitter is designed primarily for Original Equipment Manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, or fans. It provides a simple 4-20 mA proportional vibration signal to be used as input for machinery control systems.

Specifications

Electrical:

• Input:

  • Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.

• Power Requirements:

  • Requires +12 to +35 Vdc input at the transmitter terminal.

• 4 to 20 mA Signal Output:

  • 4 to 20 mAdc output over the specified full-scale range in a 2-wire configuration.

• 4 to 20 mA Loop Accuracy:

  • Within ±1.5% over the specified full-scale range. Accuracy is rated from the TEST signal input to the voltage measured across a 250 Ω loop resistance. The ±1.5% error is in addition to the Prox Out Incremental Scale Factor.

• Probe Gap:

  • Probe must be gapped between 0.5 mm (20 mils) and 1.75 mm (55 mils) from the target to ensure full-scale range.

• Maximum Loop Resistance:

  • 1,000 Ω, including cable, at 35 Vdc.

• Current Limiting:

  • 23 mA typical.

• Zero and Span Adjustments:

  • Non-interacting external adjustments.

• NOT OK / Signal Defeat:

  • Signal output will go to less than 3.6 mA within 100 µs after a Not OK condition occurs. The signal output is restored within 2-3 seconds after the Not OK condition is removed.

• Frequency Response:

  • 5 Hz to 6,000 Hz ±0, 3 dB.

• Minimum Target Size:

  • 9.5 mm (0.375 in) diameter.

Leadwire Length:

• Maximum cable distance for Proximitor Sensor Output (BNC connector): 3 meters (10 feet).

Environmental:

• Operating Temperature:

  • -35°C to +85°C (-31°F to +185°F).

• Storage Temperature:

  • -52°C to +100°C (-62°F to +212°F).

Hazardous Area Locations:

• Non-Hazardous, Zone 2 or Div 2.

Power Supply:

• 28 V.

Materials:

• Transducer Tip Material:
  • Polyphenylene sulfide (PPS).
• Transducer Case Material:
  • AISI 303 or 304 Stainless Steel (SST).

Weights:

• Transmitter Weight:
  • 0.43 kg (0.9 lbs).
• Total System Weight (Typical):
  • 0.82 kg (1.8 lbs).