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The 990-04-70-03-00 is a 990 series device manufactured by Bentley Nevada, USA. It is used to monitor the mechanical and thermodynamic properties of devices such as centrifugal air remote controls, particularly for non-contact static and dynamic intermittent measurements of metal rotors.
Integrated Proximitor Sensor requires no external unit
Choice of DIN-rail clips or bulkhead mounting screws as standard options simplifies mounting
Test Input pin for quick verification of loop signal output, using a function generator as the input
The 990 Vibration Transmitter is intended primarily for the original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, or fans who prefer to provide a simple 4 to 20 mA proportional vibration signal as the input to their machinery control system. The 990 Vibration Transmitter's PROX OUT coaxial connector provides a non-isolated dynamic transducer signal for machinery diagnostics. You can connect this signal directly to battery-powered or isolated test equipment to diagnose machinery problems. However, since the PROX OUT signal is not isolated from the 4 to 20 mA loop signal, an interface is available (and strongly recommended) for signal isolation. The 990/991 Test Adapter conditions the 990 Transmitter's PROX OUT signal for use with ac powered test equipment. It also inverts and isolates the 990's transducer signal, making it suitable for equipment such as oscilloscopes and analyzers, and preserving industry standard conventions for signal polarity.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 990-04-70-03-00 Vibration Transmitter Manuals, Datasheets, Drivers, 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.
Petroleum Refining
Monitoring radial vibration on crude oil transfer pumps, with signals interfaced directly to the DCS.
Thermal Power Generation
Monitoring journal vibration of boiler feed pumps to ensure feed water system stability.
Semiconductor Sector
Monitoring the operating smoothness of Ultra-Pure Water (UPW) circulation pumps.
Cement Industry
Installing on induced draft (ID) fans to provide automated alarms via 4-20mA signals.
Water & Municipal
Monitoring abnormal vibration caused by impeller clogging on sewage lift pumps.
Agricultural Irrigation
Transmitting vibration signals of large-flow irrigation pumps back to a central PLC.
When using the 990-04-70-03-00 transmitter, it is critical to ensure the total system length strictly matches 7.0 meters with the 3300 XL 8mm probe and extension cable to avoid significant measurement errors. As a loop-powered device, verify that the PLC/DCS load impedance is within limits and never disassemble the unit under power in hazardous areas. Additionally, periodically check the gap voltage via the Prox Out jack to confirm probe health and ensure the housing is properly grounded to prevent electromagnetic interference from causing 4-20mA signal fluctuations.
It is a loop-powered vibration transmitter manufactured by Bently Nevada, used to measure radial vibration and convert the signal into a 4-20 mA output.
What is the primary use of 990-04-70-03-00?
It is primarily used to interface eddy current probe vibration signals directly into a PLC or DCS system, eliminating the need for expensive central monitoring racks.
What is the working principle of 990-04-70-03-00?
It receives the eddy current signal from the probe, processes the high-frequency vibration component, and scales it linearly into a proportional current output.
Does 990-04-70-03-00 require an external power supply?
It is loop-powered, typically energized by the 24V DC analog input channel of the DCS/PLC.
Which probe is 990-04-70-03-00 compatible with?
It is specifically designed to work with Bently Nevada 3300 XL 8mm probes.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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