Vibration Measurement

What is Turbine Supervisory Instrumentation (TSI) ?

S Bharadwaj ReddyJuly 28, 2019November 13, 2019

The Turbine Supervisory Instrumentation or TSI includes those measurements which monitor the behavior of the rotor train assembly. These include the speed, vibrations, axial position and differential expansion of the turbo...

Gap Voltage of Bently Nevada Vibration Probe

S Bharadwaj ReddyJuly 27, 2019October 27, 2019

Gap voltage (VDC) is a direct representation of distance between the probe’s tip and the shaft’s surface. This is the quiescent voltage that needs to be adjusted between the proximitor’s...

Different Types of Turbine Protective Devices

S Bharadwaj ReddyMarch 28, 2019September 28, 2019

This article provides the list of different types of Turbine Protective Devices like turbine over speed trip, low lube oil pressure, axial displacement, turbine temperature and turbine vibrations. Turbine Protective Devices...

What is Keyphasor ? How does Keyphasor works ?

S Bharadwaj ReddyJanuary 22, 2019October 1, 2019

A transducer that produces a voltage pulse for each turn of the shaft, called the Keyphasor. This keyphasor signal is used primarily to measure rotating shaft speed and serves as...

Proximity Transducer System Operation

S Bharadwaj ReddyJanuary 21, 2019June 7, 2019

Proximity Transducer System provides an output voltage directly proportional to the distance between the probe tip and the observed conductive surface. It is capable of both static (position) and dynamic (vibration) measurements, and...

Mechanical Vibration Switch Principle

S Bharadwaj ReddyFebruary 22, 2018July 21, 2019

Mechanical Vibration Switches provide vibration protection for low- to medium-speed machinery. An inertia sensitive mechanism activates a snap-action switch with SPDT output contacts if the vibration exceeds an adjustable setpoint....

Non-contact Vibration Measurement

S Bharadwaj ReddyFebruary 21, 2018March 12, 2019

Types of Non – Contact Vibration Measurement Path Measurement Capacitance Eddy Current Hall Effect Optical Speed Measurement Laser-Doppler vibrometer Seismometer Acceleration measurement Path measurement Capacitive Principle The capacitive principle can...

Contact Vibration Measurement

S Bharadwaj ReddyFebruary 21, 2018November 13, 2018

Types of Contact Vibration Measurement Path Measurement Potentiometer Type LVDT Type Speed Measurement Electrodynamics Seismometer Acceleration measurement Piezoelectric sensor Piezo-resistive sensor Resistive sensor Inductive sensor Path Measurement Potentiometric Transmitter The...

Accelerometer Vibration Probe Principle

S Bharadwaj ReddyFebruary 12, 2018June 16, 2019

In simple language we say that vibration is a movement or mechanical oscillation about an equilibrium position of a machine or component. Vibration is a by-product of an otherwise useful...

Speed Probe Working Principle

S Bharadwaj ReddyDecember 6, 2017February 11, 2019

Rotating machinery requires speed sensing for functional systems such as control, monitoring, and safety. To ensure safe operation, it is especially important to monitor rotor speeds in turbine engines. Inductive...

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Category : Vibration Measurement