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

1 Answers  

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in control valve is constructed as per API 6D or API 6A, then which standard is used for fire testing of valve?.

1 Answers  

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How to consider the flow directions for control valve (Globe) Is the there any easy understanding in order to select the flow directions?

3 Answers  

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why the SCAN time of DCS is more & that of PLC is less? if the SCAN time of DCS then why we use DCS.

4 Answers  

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What are primary elements of measuring pressure? Which type of pressure can be measured by these elements?

0 Answers  

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Can we use thermocouple in generator of power station replace RTD(pt 100)? if we don't have any place for use RTD.

2 Answers  

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Why we use 4 to 20 mA, (This is International Standard) instaed of this can we use 4-16, or 4-24 or 3- 15 or any other range

13 Answers   ONGC,

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how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

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how to define the P,I,D value in tuning pid loops in online.

1 Answers   Thermax,

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how can we caliberate interface level troll

2 Answers   Grasim, IOCL, KOC, Sankyu,

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Give 2 application of quartz crystal used for process parameter measurement.

0 Answers   ADMA OPCO,

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Technician A says the brake warning light is connected into both the parking and service brake systems. Technician B says the brake warning light will come ON only if the service brake system fails. Who is correct?

2 Answers  

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