1 3
Bently Nevada

Bently Nevada 990-05-50-02-01 2-Wire Vibration Transmitter
SKU: 990-05-50-02-01
In stock: 15
Description

Bently Nevada 990-05-50-02-01 2-Wire Vibration Transmitter

The Bently Nevada 990-05-50-02-01 serves as the primary 990 Vibration Transmitter utilized to execute continuous shaft vibration measurement and current-loop signal transmission across Bently Nevada proximity monitoring platforms. The transmitter interfaces directly with a 3300 NSv proximity probe system and converts dynamic vibration measurements into a proportional 4-20 mA output suitable for control, monitoring, and data acquisition systems.

Suffix Breakdown & Model Matrix

  • 990 designates the 2-Wire Vibration Transmitter product family.

  • -05 specifies a measurement range of 0 to 5 mils pp.

  • -50 identifies a 5.0 m system length configuration.

  • -02 specifies the bulkhead screw mounting option.

  • -01 identifies the version carrying CSA Division 2 approval.

Only suffix definitions explicitly provided in the supplied documentation are included above.

Hardware Specifications

Parameter Specification
Model 990-05-50-02-01
Brand Bently Nevada
Origin Not specified in supplied documentation
Product Type 2-Wire Vibration Transmitter
Compatible Probe Bently Nevada 3300 NSv Proximity Probe
Compatible Cable System 5.0 m probe system
Input Signal Eddy-current proximity transducer signal
Output Signal 4-20 mA proportional current loop
Measurement Range 0 to 5 mils pp
Supply Voltage +12 VDC to +35 VDC
Loop Accuracy ±1.5% of span
Maximum Loop Resistance 1000 Ohm
Current Limiting 23 mA
Recommended Probe Gap 0.5 mm to 1.75 mm
Frequency Response 5 Hz to 6000 Hz (+0, -3 dB)
Mounting Method Bulkhead screw mounting
Operating Temp -35 to 85 deg C
Storage Temp -51 to 100 deg C
Relative Humidity 100%, condensing environment supported
Environmental Protection Potted coaxial connector protection
Dimensions Approximately 198 mm x 20 mm x 261 mm
Weight Approximately 0.43 kg

Gap Voltage Verification and Rotor Dynamics Measurement

The 990 Series transmitter operates with Bently Nevada eddy-current proximity measurement technology and derives vibration data from shaft displacement signals generated by the associated probe system. Proper commissioning requires verification of probe gap voltage and transducer linearity before vibration measurements are accepted for operation. During setup, gap voltage values approaching the nominal -10 VDC operating region are commonly used to confirm appropriate target positioning and measurement system calibration. Correct gap adjustment contributes to consistent shaft vibration measurement and improved correlation with rotor dynamic behavior.

Frequently Asked Questions

Q: What occurs if the loop current exceeds its normal operating range?
A: The transmitter incorporates current limiting at 23 mA to restrict excessive loop current under abnormal conditions.

Q: Can the transmitter operate directly from a PLC analog input loop supply?
A: The device is loop-powered and requires a DC supply between 12 VDC and 35 VDC while maintaining loop resistance within the specified limits.

Q: What probe system is supported by this transmitter?
A: The transmitter is designed to operate with a Bently Nevada 3300 NSv proximity probe and matching extension cable system.

Field Installation Guidelines

  • Verify probe, extension cable, and transmitter compatibility before installation.

  • Maintain the specified probe gap range during commissioning.

  • Route proximity probe cabling separately from motor power cables and switching circuits.

  • Preserve cable shielding continuity throughout the transducer circuit.

  • Confirm loop supply voltage remains within the required 12 VDC to 35 VDC range.

  • Ensure total loop resistance does not exceed the allowable design limit.

  • Secure the transmitter using the specified bulkhead mounting arrangement.

  • Inspect environmental seals and cable entry points before placing equipment into service.