why we take 4 to 20 mA as out put of every instrument like
pressure transmittre ?why we cant take 0 to 20mA as output?
Answer Posted / haridass (kwt)
Including the above answers the reason for selection of 4-
20mA for the transmitter signal is, the LINEARITY.
From 0-4mA the signal will not be much linear (in graph we
can come to know),
from 20+ mA is the indication to conclude that the
measuring signal is above to its range or loop fault.
Only from 4-20 the mA signal is with perfect slope.
Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
why is not useing in boiler skin thermocople
Hi Friends , i need one urgent help , i am preparing for M.tech entrance examination , i need some obejective questions related to instrumentation field. where can i get those ? can anyone help me pls ?
How does a single acting, spring return ball valve actually work? Does it require continuous air supply?
can any send me a forbes marshall dtron 316 manual
What is rang ability?
Which types of quections asked in interview for FORMULATION PLANT (PHARMA)
Full form of KKS when use DCS.
Decibel.
Gas equation
What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?
What is modbus?
what is function of sensor, and how is it work , explain with difination
how works encoder in plc
How to calibrate level transmitter with use of HART?
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?