Interested to Buy Any Domain ? << Click Here >> for more details...
transmitter in 3 connection +,-,And test mode so how Use To Test Mode
- 1 Answers
- 7980 Views
- Essar, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
The 'test' connections on a 2 wire, loop powered pressure transmitter have a diode behind them.
If a milliampmeter is connected across the test terminals (in parallel with the diode), the impedance of the meter is less than the diode's, so current will flow through the milliampmeter. There is not enough voltage drop to forward bias the diode and the diode will not conduct with a low impedance meter circuit connected across it. The diode turns off and the current flows through the meter.
Test terminals are provided for loop troubleshooting so that loop current can be measured without breaking or opening the loop circuit so that the milliampmeter can be put in series in the loop circuit.
Carl Ellis
Measure First
| Is This Answer Correct ? | 13 Yes | 0 No |
Post New Answer View All Answers
any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.
What happen if we install my pressure transmitter below the elevation of pipe in natural gas service?
What is megering????
I want to know about DDCMIS in detail ? please explain it. Also give name of reference books in which it is explained in detail in very simple manner.
Pl send the model question paper of mahagenco account officer post
I have completed B.E. Instrumentation & control in 2009. i have 3 year industrial job experience in chemical plant.now, I want to join M.E. in external. so, Plese say easiet way and good institute name.
How u will setup SPI(2007) on Citrix Server (Thin Client Mode)? Plz Justify?
what is the working principal of pribe
draw the block diagram of a level transmitter ?
what is commisioning procedure,2)what is is the main work in commisioning in the field tx to dcs, plz send me detail
1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.
what is span value and zero ? and how set ?
What is super thermocoupal?
How is automatic reference junction compensation carried out in temperature recorders?
how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?
