Why we use 4 to 20 mA, (This is International Standard)
instaed of this can we use 4-16, or 4-24 or 3- 15 or any
other range
Answer Posted / rajesh.a
STANDARD VOLTAGE IS 1-5V DC,250OHM RESISTANCE
AT V=I*R
AT 1V=I*250OHM = 4MA
AT 5V=I*250 OHM = 20MA
SIMPLE CALCULATION
Is This Answer Correct ? | 3 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 to Calibrate Flammable gas detector in field
sir,would you please send me the Hindustan petroleum corporation limited papers(HPCL).my e-mail ID is ujjwal_sharma1983@yahoo.com
hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....
what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?
Hook up resistance decade box to temp.transmitter.
in differential pressure transmitter,min&max pressure range for hp&lp
Emergency Shutdown Systems/ Plant Shutdown System.
draw shematic diagram of c/v positioner(smart type)?
how many maximum enter 2mm Dia solid cylindrical pipe into 8mm Dia hollow cylindrical pipe. give answer with calculation.
is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?
how to relay switch sense the fault?
how many types of preheaters are in cement industry & what r they can any body explain?
what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?
what can of fault ofently come in vibration mesurement?