Answer / abhijith

if process value is above than instrument range that is IOP
input open and if u remove 24v supply in transmitters it
shows IOP.

Answer / dass

IOP is an alarm condition where in the input data has become a bad value as a result of disconnection of a detection terminal or process I/O device or the abnormalities of input destination data .

Answer / nani

if process value in line is very high and loop power 24 v
failed to transmitter

Answer / ali imran fmb

If the Process value went to over range value due to any reason and frequently triggering alarm on the DCS or SCADA. To avoid this frequent alarm if the DCS or SCADA scanned off or shelving facility is locked, some technicians remove the 24v supply in transmitters then it will trigger alarm input open as well as it will show IOP on the face plate of the this tag number instead of normal. (NR)

hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

0 Answers  

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the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

0 Answers  

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Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com

0 Answers  

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what is the primary sensing element in flow or pressureand level transmitter?

5 Answers   Power Grid,

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is motorized valve closed when power shutoff?

0 Answers   Unilever,

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What is the use of gauge?

0 Answers  

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Will Intergraph support SmartPlant Instrumentation in an AutoCAD or MicroStation environment on a long-term basis?

1 Answers   Siemens,

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what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

0 Answers  

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Which type of pressure can be measured by primary elements?

0 Answers  

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What is the main difference between Cavitation and Flashing?

1 Answers  

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what is absolute pressure, gauge pressure and atmospheric pressure?

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what is the difference between 3,4 wire RTD sensor?

6 Answers   HTA Instrumentation,

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