why we use 4-20 mA to do calibration of the instruments.why
we cant use 0-20 mA?
Answer Posted / ramu
For electronic Instruments operates with 24V(DC),will give
output 4-20MA and pnuematic Instruments operates with 20PSI
will output 3-15PSI.These instruments circuits are arranged
in such a manner that the out put should be as mentioned
above because you will get LENIERITY only in these
ranges.If you take 5-22 MA, you will not get lenier output
( 0%-4MA,25%-8MA,50%-12MA,75%-16MA and100%-20MA)
Is This Answer Correct ? | 6 Yes | 3 No |
Post New Answer View All Answers
KAlman filter code for two dimension?
What is the main difference between Cavitation and Flashing?
To become an Instrument DESIGN engineer, is there any softwares or training to become Instrument Design engineer, plz suggest me, Iam very much interested in designing.
What is shielding effect?
Explain Gas Turbine startup and shutdown sequences
Where is wet leg is used?
Describe the function of Accumulator into the Pump
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
In which principles tx ,pressure gauge,Temp gauge,control valve works?
What is instrumentation technologists and mechanics?
i hav applied for the post of engg. in iocl so please require the past test papers fro instrumentation engg please please help me and send me the papers or tell me the pattern and type of ques asked in examination......
How can you add value to this Industry if offered the job?
you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.
Basically iam Instruemntation Engineer, but Iam interested in Instruments design engineering, so plz guide, is there any course, training or Softwres to become Instrument design engineer??.
Difference between 2-Valve Manifolds, 3-Valve Manifolds and 5-Valve Manifolds 3 with diagram