generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?
Answer Posted / manohar m chotrani
In an electronic transmitter power supply varies with the
load attached.Normal power supply is 24V DC for a
transmitter. of this 12 volts are required to run the
transmitter without any load.This will give 4-20 mA as
output as we go on increasing the load we have to increase
the supply voltage to get a 4-20 mA current. Every load of
50 ohms require 1 volt increase in the supply voltage but
upto a certain limit like ABB made transmitter can take load
upto 2020 ohms with the 55 volts as supply.Beyond 55 we can
not increase the supply because operating voltage is 12-55
volts. If we increase the load beyond 2020 ohms with 55
volts current output will be affected.There is no voltage
regulator in the transmitter
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?
Explain PID controller tuning & any one method used for it.
In apron feeder how TPH is calculated?
what is the difference between active & reactive power?
where i can get training in INTOOLS and PDMS in Delhi-NCR OR north part of India. please reply with ur ans. at arunsamkaria@ymail.com
how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?
Explain operation of Haskel pump.
you are on site,the plant trips,you are approached by operations,what do you do?
Hi,can anyone help me out with PhD programs related to Instrumentation field?I have a degree in electronic Instrumentation?
flow transmeter accuracy 0.075% of full scale & find ucertainty is 0.025 % so what is maximum limit band of uncertainty
i am preparing for BARC ,so plz mail me how to prepare for BARC. ALSO IF POSIBLE SOME RELATED QUESTIONS. MY MAIL ID IS khushi_4uall2003@yahoo.co.in
Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows
how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw
what is the difference between Cv and air consumption? why the customer needs Air consumption details?
Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...