what should be the distance of vibration sensor & to the point where vibra

what should be the distance of vibration sensor & to the
point where vibration to be measured Ex turbine axial
displacement

Question Posted / prakash h kusuma

3 Answers
7768 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what should be the distance of vibration sensor & to the point where vibration to be measured ..

Answer / prakash

The philosophy is different for Axial and Radial
measurment. For radial measurement the AC component voltage
is directly proportional to the magniture of vibration so
the gap is fixed based on the probe linearity (usually
10vdc for bently nevada probes).
For axial measurement the AC component voltage is not
important and only the DC component is considered which
varies proportional to the distance between the probe and
the shaft. Conversely, the shaft is centered and the probe
voltage is adjujsted to 10Vdc and the same voltage is also
referenced in the system for shaft zero position. While the
unit/turbine is running the position of the shaft is
proportional to the dc component measured.

Is This Answer Correct ?

4 Yes

0 No

what should be the distance of vibration sensor & to the point where vibration to be measured ..

Answer / sohail

50 mils

Is This Answer Correct ?

0 Yes

0 No

what should be the distance of vibration sensor & to the point where vibration to be measured ..

Answer / deepak kumar behera

The distance of vibretion sensor and the piont where the
vibretion is to be measured is should be 1.5 mm.

Is This Answer Correct ?

2 Yes

9 No

Post New Answer

More Instrumentation Interview Questions

How does the "as-built" function benefit plant owner/operators?

2 Answers

A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers

tell how to calibrate a magnetic flow tx, vortex flow tx,dp flow tx,nozzle flow tx and venturi flow tx?

2 Answers TATA,

The DCS has the following signal type:

3 Answers

what is mean by process control?

4 Answers

Close loop and open loop.

3 Answers CCIE,

What are the Components of Siemens S7 300 Series PLC system ?

1 Answers Siemens,

How to gennerate earth leakage monitoring alarm for solenoid valves in control system?