Answer / prateek pathak

DDC stands for Direct Digital Controller. It can be called a PLC based system and it is recommended for HVAC systems. DDC keeps a centralized approach and all digital and analog controllers are placed under it.

what would be the minimum flow rate that we can measure on rotameter..?

0 Answers   TATA,

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If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used?

2 Answers  

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What is SLPC & MLPC? How it works?

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Please explain about FAT? What is the difference between FAT and SAT?

6 Answers   IBM,

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1 Answers  

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relation between level and differential pressure.

3 Answers  

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define feed forward control loop with example and drawing?

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2 Answers   IFFCO,

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what do you mean by cathodic protection?

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An RTD is a_________________________.it works as follows

2 Answers  

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How to calibration a control valve?

0 Answers  

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