Answer / madanraj

Snubber ckt is used to protect the scr from over current and over voltage.

Answer / arpita

snubber circuit is someting like a "bumper." It alleviates the rise of voltage when the switch of scr/transistor is turning OFF, and alleviates rise of current when the switch of scr/transistor is turning ON, to a safe level.

how to wire from pressure transmitter to marshalling panel and panel to controller and controller to dcs plz give the answer with example .

2 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 to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,

0 Answers   TATA,

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in i/o panel for digital ouput(do) how much power(in volts) we must give?

2 Answers  

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what is plc communication?

2 Answers   Siemens,

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Why humidity limit is 30 to 55 % for raw material storage?

1 Answers  

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1. What means HART communicator / where it is used / how to use it? 2. Types of Thermocouples and its temperature ranges / output of thermocouple? 3. Types of RTDs and its temperature ranges / output of RTD? 4. Idea about Temperature Transmitters? 5. Difference between Analog and Digital signals? 6. Difference between “2 wire” and “4 wire” system / instruments? 7. Difference between “Potential” and “Potential free” contact? 8. Types of flow meters / transmitters? 9. Types of level transmitters? 10. Difference between “Power/Control” cable and “Instrument” cable? 11. What means “shield” and “screen” in cables / how it is useful? 12. Draw a schematic of closed loop circuit of flow / level / pressure / temperature? 13. Idea about calibration of Control valve / positioned / I/P? 14. How to bypass a digital/analog signal in PLC/DCS by hardwire and software?

6 Answers   JSL,

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IF I WANT TO BUY A THERMOCOUPLE THEN WITCH PARAMETER I LOOK

1 Answers  

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i have calibrate rosemount make level transmitter , wht can i do ? my tank capacity is 30,000 liter

9 Answers   Equate,

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What is rtd output signal

4 Answers   Nestle,

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how can i calibrate the temperatuture gauge used by temperature bath(dry block) i mean step by step procedure?

0 Answers   Texas,

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if I did short to both AO connections, channel will burn or what? m sure in AI it will damage to channel. But what will happens in AO?

1 Answers  

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