Bently Nevada 990-04-70-02-CN | Two-wire Vibration Transmitter

Product Overview

The Bently Nevada 990-04-70-02-CN is a 2-Wire Vibration Transmitter designed for high-precision measurement in various industrial environments. Made in the USA, this robust unit supports a wide range of applications, including machinery monitoring and predictive maintenance. With a full-scale range of 0-4 mils (0-100 μm), the 990-04-70-02-CN ensures reliable and accurate data capture.

Technical Specifications:

• Brand: Bently Nevada
• Model: 990-04-70-02-CN
• Full-Scale Range: 0-4 mils (0-100 μm)
• System Length Option: 7.0 meters (23.0 feet)
• Probe Gap: 0.5 to 1.75 mm (20 to 55 mils)
• Output Impedance: 10 kΩ calibrated for a 10 MΩ load
• Incremental Scale Factor: 7.87 mV/μm (200 mV/mil) ±6.5%
• Proximity Sensor Output: Compatible with ungrounded portable test equipment
• Frequency Response: 5 Hz to 6,000 Hz +0, -3 dB
• Current Limiting: 23 mA typical

FAQ

• Q: What is the minimum gap between the probe and the target?
  A: The probe must be gapped between 0.5 mm and 1.75 mm (20 to 55 mils) from the target for optimal performance.
• Q: What is the maximum loop resistance?
  A: The maximum loop resistance is 1,000 Ω, including the cable at 35 VDC.
• Q: How does the signal defeat function work?
  A: The signal output drops below 3.6 mA within 100 µs after a “Not OK” condition, with recovery in 2-3 seconds once the condition is removed.

For more detailed information:990 Vibration Transmitter Datasheet