Vibration Transmitter | 990-10-XX-01-05 MOD: 165353-07 | Bently Nevada

Technical Specifications

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 transmitter is a two-wire, loop-powered device that accepts input from our 3300 NSv proximity probe and its matching extension cable (available in 5 m and 7 m system length options). 

Feature

Integrated Proximitor Sensor requires no external unit

Non-isolated PROX OUT and COM terminals plus a coaxial connector to provide a dynamic vibration and gap voltage signal output for diagnostics

Non-interacting zero and span potentiometers under the Transmitter label supports loop adjustment

Test Input pin for quick verification of loop signal output, using a function generator as the input

A Not OK/Signal Defeat circuit prevents high outputs or false alarms due to a faulty proximity probe or loose connection

Application Scenarios

Centrifugal air compressors

Small and medium-sized industrial pumps

Electric motors and large fan systems

Technical FAQ

Q: How can dynamic waveform and gap voltage be measured in the field on the 990-10-XX-01-05 MOD:165353-07 transmitter?

A: The front panel provides a BNC coaxial connector plus non-isolated PROX OUT and COM terminals. Technicians can connect an oscilloscope or dynamic signal analyzer to read real-time shaft vibration waveforms and DC bias voltage (linear range: 10–65 mils).

Q: What is the function of the “TEST Input” pin on the 990-10-XX-01-05 MOD:165353-07 transmitter?

A: It is a test input terminal. A function generator can inject an AC signal to quickly verify the 4–20 mA loop and DCS/PLC response without removing or moving the probe.

Q: How does the 990-10-XX-01-05 MOD:165353-07 prevent false trips when a probe fails or cable disconnects?

A: It includes a Not OK / signal failure protection circuit. In case of probe fault, disconnection, or cable damage, loop current is forced below 3.6 mA within 100 μs, which is interpreted as a channel fault rather than high vibration, preventing false trips.

Q: Can zero and span be adjusted in the field on the 990-10-XX-01-05 MOD:165353-07 transmitter?

A: Yes. Independent Zero and Span potentiometers under the label allow precise calibration using a small flat screwdriver, with no interaction between adjustments.

Q: Are your products brand new?
A: Yes. We only supply 100% original and brand-new products. All items are sourced through authorized channels and have never been used or refurbished.

Q: Why can customers buy with confidence?
A: Because every product is backed by our 1-Year Warranty Guarantee of Quality, ensuring reliability, customer satisfaction, and long-term support after delivery.

Q: Do you provide international shipping?
A: Yes. We ship products to customers worldwide using reliable international logistics services such as EMS, DHL, UPS, and FedEx.

Trusted by 5,000+ plants worldwide |  Contact for more Bently Nevada spares: sales1@amikon.cn

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