Why only negative 24 vdc supply give in vibration measuring
system.
Answer Posted / nandan
The principle is that analyzer supplies a negative voltage
to transducer,who converts it into a frequency & sends it
across the probe.Now as the probe comes into the area of
rotor it creates a magnetic field & with it eddy current is
produced on the rotor side.Which changes the amplitude of
the frequency.It induces the voltage & remaining frequency
comes to the transducer through the return way.Transducer
converts it into the voltage .
Now coming back to the question The gap voltage has a
negative relation with the voltage induced i.e. as the gap
increases the induced voltage decreases.So to make it to
into a linear relation ship, negative voltage is supplied.
i.e
Gap Gap voltage
0 mm 0 vtg
1 mm -9 voltage
2 mm 18 voltage
& when the probe is in air it will have no induced voltage
so all -24 voltage without induced voltage will return back.
Is This Answer Correct ? | 16 Yes | 7 No |
Post New Answer View All Answers
sir, give me placement papers and interview quistion of birla group company of copper.
How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.
How to calculate mmwc values into tonnes?
please tel me the calibration of pneumatic controler.
how will you segregate the alarm levels in alarm management system during factory Acceptance Test
What you mean by multi stage control vavles?
Explain about the leakage class of the control valves
few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters
HOW TO SOLVE PROBLEM WITH ENRAF LEVEL TRANSMITTER 854 ATG THAT PASSWARD DO NOT Exist INTO TRANSMITTER TO ADJUST LEVEL WITH PORTABLE PET 847, WRITTEN WRONG PASSWORD , I AM SURE THAT DEFAULT PASSWARD (W2=ENRAF2) IS THIS TRANSMITTER NEED TO REPLACE SOFTWARE AND HOW?
in mass flow meter what is drive friquancy ?
what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?
Why plc require in analog input 4-20amp & 0-10 volt?
䑰ҕ䔈ҕ䖠ҕ䘰ҕ䛀ҕ䝐ҕ䟐ҕ䢐ҕ䥐ҕŹ
What is rang ability?
how to calibrate Necleuonic level transmitter.?