what is the difference between Digital output DO signals /Commands for start/stop and Solenoid valves ??

1 Answers  

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Somebody tell me in what way i need to prepare for csio pgrpe(adv instrum eng)interview?what all the quest can i expect?

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How earthing can be checked????

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1.In which princeple DP transmeter works? 2.Why UPS system is use for DCS? 3.How drum lvel controller works? 4.What is the difference between glob valve and gate valve? 5.How axial shift probe work & in which princeple it works?

1 Answers   Luberef, Qatar Gas, Reliance,

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If Solenoidal valve works in manual mode but not in Auto mode. What should be the problem?

8 Answers   Bharathi Cement, Titanium,

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what is the difference b/w magnetic flow meter&mass flow meter? which one is best?

1 Answers  

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What is the formula to convert mv to temperature in k type thermocouple?pls simply elaborate? I got one ans.it is Temp=mv×25°+atmospheric temp,but here what is 25°,i confusef ,so pls????

2 Answers   HPCL,

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What is the difference between mmwc and mmwg?

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can i get any detail of interview question asked for instrumentation,plc,scada ,dcs..............

2 Answers   Asec, Honeywell,

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how to connect 3 wire 4-20 mA transmitter in Plc system PLC system and how explain how the measuring data communicate with plc system.

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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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Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

0 Answers   KOC,

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