Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / richard marks
an i/p converter converts current to pressure. To calibrate
we first need to determin the range of the input and the
output. The current input is usually 4-20mA and the output
is usually 3-15psi (usual industry standards).
Calibration assuming the above input/output:
First connect a milliamp source to the input and a pressure
indicator (pressure gauge, druck etc.) to the output.
Inject a 4mA signal (0%) and check the output is reading
3psi, if not adjust the zero until the output reads 3psi.
Next inject a 20mA signal (100%) and check the output is
reading 15psi, if not adjust the span until the output
reads 15psi. Again inject a 4mA signal and check the 3psi
output as adjusting the span can alter the zero and if it
has changed and adjust as required. Check the span again at
20mA and repeat until the converter reads 3psi at 4mA and
15psi at 20mA repeatedly. Next check the linearity by
injecting signals for 0, 25, 50, 75 & 100% the output
should read as follows;
0% (4mA) 3psi
25% (8mA) 6psi
50% (12mA) 9psi
75% (16mA) 12psi
100% (20mA) 15psi
| Is This Answer Correct ? | 43 Yes | 0 No |
Post New Answer View All Answers
pls provide me syllabus and old question paper of instrumentation engineering for GET(JSPL)
What are the materials available to prepare individually for competetive exams in Instrumentation field? Plz reply...
when a magnet is heated?
How to calibration a control valve?
Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com
State four different types of flow measurement, for gas flow measurement MMSCFD is the common unit expand the unit and specify significance of word S in the unit.
Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?
what does it mean an active front end in vfd plz explain it briefly
How u will setup SPI(2007) on Citrix Server (Thin Client Mode)? Plz Justify?
How to work togather like sov,limit switch,proxy switch and booster in xv
Explain operation of Haskel pump.
How to calibrate Field bus transmitter? procedure ?
please send the sample qustion paper for iocl written test ..
send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com
what is vibration a part of proceess variable? if vibration is a part variables then how we minimize the actual vibration on machine on load,? vision of instrumentation contrl plz ans me IPGDL interview question
