why we use 4-20 mA to do calibration of the instruments.why
we cant use 0-20 mA?

Answer Posted / rathina

Normally we say Live Zero concept. means transmitter shows
0 means due to powerloss or process value loss.

Is This Answer Correct ?    7 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Can I calibrate the Electromagnetic Flow Meter on line and How.

1399


if in a level tx height is given, how u calculate the ranges of the tx?

6413


A flange is used for instrument connection for a system with a design temperature of 316C (600F) and a design pressure of 1000 kPa (145 psi). What is the class rating of the flange to be used for this application? Explain your answer

1874


1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

2079


please send the drdo exam paper

1956






Where Can i take a SPI INtools training in Mumbai? In Rolta India Ltd to whom I should approach regarding of SPI INtools Training?

2326


define feed forward control loop with example and drawing?

2742


What is zero elevation and zero suppression?

1612


Speedtronic system .

1541


hi! i want to know about mpse exam.

1790


How to calibrate an pressure gauge with yantrika test bench?

2376


plz you help about Que paper of mahagenco previous your,any model paper relad to it{maharastra power genration}

1896


What is heating effect?

1884


What is the difference between mmwc and mmwg?

860


what is the electrical operation procedure for switching on 27.6MVA electric furnace.

1606