Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / mathan
loop checking means ,after installation of instruments we
must check full loop(instrument-junction box-control room)
to ensure that whether the instruments are working properly
or not, and whether is it passing the signal or not,whether
is it receiving the signal or not. before we start the
plant we need to check loop..
during the loop check we give some known input
and check the corresponding output at other side(control
room)..if the output is corresponding to input, the loop is
ok..if not means, something fault inbetween the loop.
for example.if you want to check ON/OFF control
valve,during the loop check,when you give 24v dc from
control room ,the valve must open fully, and when you give
0v dc the valve must close.
| Is This Answer Correct ? | 274 Yes | 10 No |
Post New Answer View All Answers
Whatis the reset ofset and control system in instrumentation
Explain working principle of lvdt?
Can anyone send most commonly asked interview question in Oil & Gas industry
any body please send me the old question papers of ongc test.
how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?
how do u calibrate the vacuum transmitter if it shows more reading
What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)
why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V
what is orfics working in main steam line. is it increase pressure, velocity of steam flow and dicrease steam flow rate. or any other
what is interface level and how it is calibrate?
draw the block diagram of a level transmitter ?
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
How does work A temperature valve or fv control valve in process plz brief me
Explain plc level and its type?
I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?
