Answer / nodoginthishunt

Read the debate about ABB's PPA HMI here:

http://www.control.com/thread/1026243614

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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i have level transmitter -400 to 0 range for steam drum application but i am unable to calibrate if installation of lt below lower tap what will be the effect ? and as per std wht is location of lt ,above lower tapping or below

1 Answers  

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What is intrinsic safety mean.

0 Answers   CCIE,

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Why Ma signal is using for control system?

1 Answers   Petrofac,

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Qatar fertilizer call me for interview as Instrumentation Project Engineer. Please let me know what kind of question they asked ? ALso they said they will take Written test, any idea about this written test ?

1 Answers   QAFCO,

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What is the maximum operative of Drive ?

2 Answers   Reddy Labs,

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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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Name some of the common protocol use in automation.

3 Answers   Empower,

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I have flow transmiter DP range is 0 to 5000mmwc,(convert) Display to be show in m3/Hr.

3 Answers   Orient,

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what is the output of conductivity sensor and PH sensor?

3 Answers  

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Calibration procedure for water rotameters

0 Answers   HPCL,

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WHAT IS DIFFERENCE BETWEEN TWO WIRE RTD AND THREE WIRE RTD?

5 Answers   Yokogawa,

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