Features:
- Links the 3300 NSv Proximity Probe to the Machinery Control System via 4 to 20 mA Output
- Integrates Proximity Sensing with Signal Conditioning for Peak-to-Peak Vibration Measurement
- Functions with the 3300 NSv Probe and Matching Extension Cable in 5 m and 7 m System Lengths
The Bently Nevada 990-04-70-03-00 Vibration Transmitter functions as a two-wire, loop-powered device designed primarily for original equipment manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, and fans. The 990-04-70-03-00 continuously accepts input from the 3300 NSv proximity probe and its matching extension cable, conditions the signal into appropriate 0-4 mils pp (0-100 μm pp) peak-to-peak vibration amplitude engineering units, and delivers this value as a proportional 4 to 20 mA industry-standard signal to the control system where machinery protection alarming and logic occur. Seamless signal transmission is standard with the 990-04-70-03-00, and its potted construction ensures reliable operation in high-humidity environments up to 100% condensing conditions. The 990-04-70-03-00 has incorporated compatibility with the 3300 NSv proximity probe, allowing transducer installation in small areas with minimal clearance typical of centrifugal air compressor applications.
The 990-04-70-03-00 provides essential vibration monitoring functions critical to machinery protection, and is a vital component of the monitoring path, directly affecting the proper, normal operation of the overall control system. One 990-04-70-03-00 transmitter is required per measurement point depending on the desired monitoring coverage. The 990-04-70-03-00 occupies minimal mounting space and offers flexible installation through DIN clips and screws as standard mounting options.
For diagnostic applications, the 990-04-70-03-00 includes non-isolated PROX OUT and COM terminals plus a coaxial connector to provide dynamic vibration and gap voltage signal output for troubleshooting purposes. In addition to standard signal transmission, the diagnostic configuration also supports non-interacting zero and span potentiometers under the transmitter label for loop adjustment. The 990-04-70-03-00 enables signal verification using the Test Input pin, which allows quick validation of loop signal output using a function generator as the input. Using this method, the 990-04-70-03-00 continually monitors the health of the proximity probe connection. If the system detects that the probe is no longer providing stable output due to a faulty connection or loose wiring, the Not OK/Signal Defeat circuit will automatically prevent high outputs or false alarms and ensure the control system receives valid vibration data.
The 990-04-70-03-00 Bently Nevada Vibration Transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-04-70-03-00 Vibration Transmitter Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 990-04-70-03-00 Vibration Transmitter Specs
General
- Manufacturer Bently Nevada
- Model 990-04-70-03-00
- Condition New Original ready stock
- Product Family 990-04-70-03-01,990-04-70-03-05
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Target Machinery: Centrifugal air compressors, small pumps, motors, and fans.
- Industries: Extensively used in oil and gas, petrochemical, wastewater, and general industrial automation.
- Use Case: Ideal for sites where full continuous monitoring systems are not practical but overall vibration trending is necessary.
- Dynamic Output: Includes a coaxial connector and terminals for a "PROX OUT" signal, providing raw dynamic vibration and gap voltage data for specialized portable diagnostic tools.
- "Not OK" Circuitry: A built-in circuit helps prevent false alarms by detecting faulty proximity probes or loose connections.
- Verification: A "Test Input" pin allows for quick loop signal verification using a function generator.
- Limitations: It does not capture dynamic signals automatically during an alarm and cannot be used for complex diagnostic systems like System 1.
- Hazardous Areas: Options are available for ATEX/IECEx and CSA/NRTL/C certifications for flammable atmospheres, though this specific "00" variant does not include them.
- Environmental Standards: Complies with FCC Part 15 for interference and IEC 60068-2-30 for humidity resistance.
- Electromagnetic Compatibility: Certified to EN 61000-4-5 for surge protection.