Vibration Transmitter | 990-10-XX-01-05 MOD: 163930-01 | 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

Loop Adjustment and Testing

Below the label are independent Zero and Span potentiometers for field loop calibration.

A built-in Test Input pin allows for the injection of analog signals via a signal generator to quickly verify the loop output of the control system.

Technical FAQ

Q: What are the power supply requirements and output signal of the 990-10-XX-01-05 MOD:163930-01 transmitter?

A: It uses a 2-wire loop-powered system, requiring +12 to +35 Vdc. The output is a 4–20 mA proportional shaft vibration current signal.

Q: What is the correct probe gap setting for the 990-10-XX-01-05 MOD:163930-01 transmitter?

A: The probe-to-target gap should be set between 0.5 to 1.75 mm (20 to 55 mils) to ensure operation within the full linear range.

Q: Will a probe failure or disconnection on the 990-10-XX-01-05 MOD:163930-01 cause false trips?

A: No. The built-in Not OK / signal failure protection circuit forces loop current below 3.6 mA within 100 μs, preventing false alarms in the control system.

Q: Can zero and span be adjusted on the 990-10-XX-01-05 MOD:163930-01 transmitter?

A: Yes. The transmitter includes independent Zero and Span potentiometers under the nameplate for precise calibration of the control loop.

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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