why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything
Answer Posted / subash
from field to control room we use lengthy cables.due to the
resistance of the cable may voltage drop occur.hence we
always choose 4-20 ma over a 0 to 10v....if we select 0-20
ma then we can'n distingush between faut condition and
minimum scale....hence we choose 4-20 ma....
Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
What is the right procedure for adjusting the gap voltage of bently nevada vibration sensor?
where uses EXe /EXd/Exo/Exn/Exp/Exq/EXia
what is the usage of QDV & VOLUME BOOSTER
OBJECTIVE TYPE QUESTIONS OF ANALYTICAL INSTRUMENTATION
what is diffrance between FF & SMART, explain with difination
How to calculate P,I&D value in PID controller ?
what is difference between fork type and capacitance type level switch. where it is using
Explain the difference between mmwc and mmwg?
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.
What materials are used in thermo wells?
What denotes the 5/8mm in the 3300XL 5/8mm proximitor probe?
how many types of viberation transmitter and how to calibrate and where use of vibration transmitter
What is the use of temperature compensation?
What is mean by analytical instrumentation?
Programmable Logic control.