VIBRATION MONITORING SYSTEM - VIBRATION TRANSMITTER

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Definition

Vibration Transmitters convert input data from one or more sensors into a standard signal. The sensor may be discrete, such as an accelerometer, shaft displacement sensor & RTD - (Resistance Temperature Detectors).

Vibration Transmitters form an important part of a vibration measurement system. Such systems are used to predict and diagnose "machine health" by detecting abnormal vibrations during operation. Through early detection of such abnormalities, plant staff can schedule a suitable repair instead of dealing with the loss of time and efficiency caused by an unexpected catastrophic machine failure.

For example, vibration transmitters may be used to sense shaft misalignment by measuring vibration with help of Proximity Sensor (Shaft Displacement Sensor). Shaft misalignment occurs when rotating machinery shafts become misaligned due to movement that results from the operation of the machine at less than optimal conditions. When shafts become misaligned, forces on the machine produce stress on various components, causing abnormal vibration.

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VIBRATION TRANSMITTER

Overview

Vibration Transmitters commonly use current loop output, an analog signal which is compatible with most meters and data analyzers. Current loop transmitters typically operate over the 4-20 mA or 10-50 mA range. A 4-20 mA loop establishes a 4 mA output as "off" (in this case "no vibration") and 20 mA as "maximum load." When no vibration is detected, the transmitter transmits a constant 4 mA current. When a vibration sensor or accelerometer detects vibration, it relays the vibration reading to the transmitter, which then alters its output to a current value proportional to the vibration reading it received.

Accelerometer Vibration Sensor

An accelerometer is a device that measures the vibration, or acceleration of motion of a structure. The force caused by vibration or a change in motion (acceleration) causes the mass to "squeeze" the piezoelectric material which produces an electrical charge that is proportional to the force exerted upon it.

RTD Temperature Sensor

RTDs - or Resistance Temperature Detectors - are temperature sensors that contain a resistor that changes resistance value as its temperature changes. They have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy, repeatability, and stability.

Shaft Displacement Sensor

Eddy-current transducers that are used for measuring Shaft Vibration, Axial Position, Rotating Speed and Phase Mark (Phase Reference) from small rotating machinery to large critical machinery such as turbines and compressors in plants. These have environment friendly design that have become the concern for all

Features

Field Configurable for Acceleration, Velocity or Displacement range

Single / Dual Channel

Independent Alarms / Trip settings

RS485 Serial Modbus Interface

Output - 4xRelays, 2x4-20mA Isolated, Averaging, Hysteresis, Alarm / Trip delay

Field / Panel mount transmitter

Input - Accelerometer / Velometer / Eddy – Current probe

Fully Programmable (Micro-processor based)

Applications

Pumps

Motors

Gear Boxes

Blowers

ID/ FD/ PA Fans

Cooling Towers

Air Compressors

Conveyors

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4 / A Wing, Bharat Indl Estate, Off. Lake Road, Opp. Hind Rectifier Co., Bhandup (W), Mumbai – 400 078 (M.S)

VIBRATION MONITORING SYSTEM - VIBRATION TRANSMITTER

Definition

Vibration Transmitters convert input data from one or more sensors into a standard signal. The sensor may be discrete, such as an accelerometer, shaft displacement sensor & RTD - (Resistance Temperature Detectors).

VIBRATION TRANSMITTER

Overview

Features

Applications

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