why do we use 4-20 ma current why cant o-20ma
Answer Posted / m.mohan
4 MA
LIVE ZERO DEAD ZERO CONCEPT
20MA
ELECTRICALLY UPTO 20MA THERE IS NO CREATING A SPARK
IN THE TIME OF SHORTED LOOP.ALSO CURRENT TRAVELLING LONG
DISTANCE WITHOUT NO DROP.(UPTO 1500m)
the main purpose for choosing 4to 20ma easily convert to
voltage to add 250 ohms resistance with the help of ohm's
law
| Is This Answer Correct ? | 8 Yes | 9 No |
Post New Answer View All Answers
what is wave length were using ?
What is rang ability?
I am teja. I am studying Msc(tech) Electronics and Instrumentation (3years course) in Andhra university. But my course is not recognised by UGC and AICTE. Please tell me the job opportunities after this course. And i fineshed PLC course in IGIAT ,Vizag.Also complted my short term coure in SCADA, Seimans WinCC in ATI,Hyd.After Msc can i join Mtech for good job? or phd. How i can get good job in INdustrial Automation Side. Please give replay.Because this is my life matter.
What is the function of solenoid valve in on/off & shutdown valve and why it is not used in control valve normally?
in sulfur process what is material of impulse line we use to connect with transmitter ? and does teflon affected by sulfur?
What is the diffrence between ff tx and non ff tx
i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.
I faced several time siemens ps2 positioner automatically getting Chang in it's set point direction after auto calibration So is there any causes biside this or any permissives ?
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??.
which type of zones used for boiler? & why ?
How hart protocol can be connected with control valves?
Please asked me How calculate DCS controller memory.
What is the purpose of the analyzer in petrochemical plant?
What is PDS and PDMS ?
Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?