Why only negative 24 vdc supply give in vibration measuring system.

6 Answers  

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Can anybody explain what is the different between ESD & PLC

1 Answers   ADCO,

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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To find closed tank level by DP transmitter , how to findout its range.and insomeplace they using range like - 1500 to +1500 mmwc why not 0 to 3000 mmwc. how they spilit they range for minus and plus.and why?

1 Answers   Kuwait Oil Company,

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Explain the thermocouple and RTD?

1 Answers  

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

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What is meant by cold float of compressor shaft.

1 Answers   Sabic,

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what is the procedure of belt scale calibration?

0 Answers  

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which type of filter gives the constant phase characteristics?

0 Answers  

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What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)

0 Answers  

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what is Best Among SINK Or SOURCE Type Design In Digital Signal, Either Iput Or Output? WHY?Can any one..

0 Answers   Accer, Reliance,

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What is the working principle of sox, nox analyzer?(opacity monitor) Otherwise how to measure the sox,nox?

1 Answers   Thermax,

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