in instrumentation why we are using 4-20mA , why not
voltage ? if somebody design a instrument which works on
voltage then can we use that instrument?
Answer Posted / yogi40
if we use voltage there there is noise interpretation
where as in current it wont happen
and current supports 2 wire connection,voltage doesnt
there will be drop in voltage when its feedback in current
such loss is very less
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.
what is the PC interface and software for connection to ABB logic module “ LM011-CE18RAC “ ( for Programming ) ??
What is the use of control cable?
Difference between ultra sonic flow meter
Can please tell mi about SIOS, PRM, SERVER, and what is the diference between PIN LAN, PCS LAN,APC Server, and please send the Doc if possible for referance,mail id patil_amit17@yahoo.com
How digital input and digital output 's are working in dcs
on interface level transmitter model(RTG3302-EMERSON) What is threshold valve how can we select correct threshold value T1,T2,T3,T4 When interface water & hydro carbon
How would you choose differential range?
How to work temperature gauge?
what is zero and span ?
what is effect of specific gravity in differential level transmitter , explain formula related with this .
why we are using drum level control valve air to close?
Why do we have earthing cable in branch cable and shield in the same cable?
What are de-saturators?
How to calibrate level transmitter with use of HART?