why we are called the 4-20ma transducer,not 0-20 ma
transducer??
Answer Posted / vaseekaran
Let us keep the value as 0 to 20 mA,
The valve we measure in the output will be zero if the meter is in idle state and also it will show the same zero even the instrument is in fail condition.so we cannot get the exact and get confused if there is a problem in instrument while cross checking.this is the reason we are using 4 to 20mA.if the instrument fail then we can get only zero and if the instrument is idle we will get 4mA.so we can easily differentiate it.
Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
What is Surge Capacitor? Why it is use in Generator Circuit Breaker?
what is the purpose of using filters in a protective relaying scheme?
why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?
what are your career plans upon completion of the programme and the relevance of recity generation to your professional development?
dg earth connect only in the amf panel or not why
What is meant by RVT and NDR ? expansion and details of it
Draw the equivalent circuit of crystal oscillator?
Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer
model question paper for supervisor trainee
What is an iron loss or core loss pi?
How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.
why does rotor rotets?
WHAT IS IM (INDEX OF MOUNTING )IN MOTORS
How does zener phenomenon differ from avalanche breakdown?