Interested to Buy Any Domain ? << Click Here >> for more details...
why do we use 4-20 ma current why cant o-20ma
- 6 Answers
- 21633 Views
- Southwest Cheese, I also Faced
- E-Mail Answers
Answer Posted / s.chandra mowli
for example take a temperature process
0 degree it must indicate -0 ma
suppose if there is any fault in the circuit then for any slight increase in temperature it indicates only zero
in order to differentiate the malfunction of instrument
we use live zero and dead zero
the instrument is biased to 4 ma to indicate the proper function of the the instrument that is Live zero
if it indicates 0 then is a malfunction in instrument that is Dead Zero
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.
How do bending tubing provide better measurement than using tubing fittings such as elbows?
How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.
why we take %i0.0 as input for twido plc
HOW TO CALCULATE ACCURACY OF AN INSTRUMENT. WHICH IS COMPITABLE FOR USE.
can any one explain in which term we are flow flow is it volumetric r is it mass? and y
what is compensation? temprature & pressure
What is zero elevation and zero suppression?
i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?
What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability?
IS there any effect of vortex in low pressure side of the transmiter after the orific in feed water line? if yes then what is the calculation?
hi i am eswar i want to know the instrumentation interview questations for eil(engineers india ltd) i have applied for engineer post in eil please help in this.my mail id eswar310@gmail.com
pls provide me syllabus and old question paper of instrumentation engineering for GET(JSPL)
what is your eligibility criteria for freashers?
HI friends.I am Surya a BTech in Electronics and Instrumentation Engineering.I am going to appear Relince Industries Ltd all India writen test very soon. so plz help me by sendind the probable questions about my subject.My mail ID is surya.barik@gmail.com.
