Bently Nevada | 990-10-XX-01-00 Two-wire Vibration Transmitter

Overview

The Bently Nevada 990 Vibration Transmitter (Product No. 990-10-XX-01-00) is an advanced, high-performance device designed for precise vibration measurement in industrial environments. Manufactured in the U.S.A., it provides a reliable solution for monitoring machinery health through vibration signals. The system is capable of handling a wide frequency range from 5 Hz to 6,000 Hz, offering superior accuracy in various applications. It is suitable for use in non-hazardous and hazardous (Zone 2 or Div 2) environments.

Key Features & Specifications

• Brand & Model: Bently Nevada, 990 Vibration Transmitter (990-10-XX-01-00)
• Full-Scale Option: 0-10 mils (0-250 μm pp)
• Mounting Option: 35 mm DIN rail clips (Option 01)
• Temperature Range: Operating: -35°C to +85°C (-31°F to +185°F), Storage: -52°C to +100°C (-62°F to +212°F)
• Probe Material: Polyphenylene sulfide (PPS) transducer tip; AISI 303 or 304 stainless steel (SST) for the probe case
• Cable: 75Ω coaxial cable, fluoroethylene propylene (FEP) insulated; Optional cable armor with flexible AISI 302 SST
• Agency Approval: No approval required (Option 00)
• Weight: 0.43 kg (0.9 lbm) for the transmitter; 0.82 kg total system weight
• Frequency Response: 5 Hz to 6,000 Hz (+0, -3 dB)
• Power Supply: +12 to +35 Vdc
• Signal Output: 4-20 mA over specified full-scale range in a 2-wire configuration
• Loop Resistance: Maximum of 1,000 Ω, including cable at 35 Vdc
• Accuracy: ±1.5% over the specified full-scale range
• Probe Gap: 0.5 mm to 1.75 mm (20 to 55 mils)

FAQ

1. What is the full-scale measurement range of the 990 Vibration Transmitter?
   • The transmitter measures from 0-10 mils (0-250 μm pp) full scale.
2. What is the maximum cable distance for the transmitter?
   • The maximum cable distance for a proximitor sensor output is 3 meters (10 feet).
3. What is the probe gap required for accurate measurements?
   • The probe must be gapped between 0.5 mm and 1.75 mm (20 to 55 mils) from the target.
4. What is the typical loop resistance limit?
   • The maximum loop resistance is 1,000 Ω at 35 Vdc.
5. What happens when a “Not OK” signal occurs?
   • The signal output will drop to below 3.6 mA within 100 µs and will be restored within 2-3 seconds after the “Not OK” condition is resolved.
6. Can the transmitter be used in hazardous areas?
   • Yes, it is suitable for Zone 2 or Div 2 hazardous locations.

For more detailed information:990 Vibration Transmitter Datasheet