Why 4ma - 20ma signal used in instrumentation??

5 Answers  

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Paper Details: company -- Hindustan Copper Limited post -- GET 2008 Date -- 03.08.2008 Dept.-- Electronics?Instrumentation Aptitude -- 70 Technical-- 80 Total Time -- 2hr 30min I have listed the question I could able to remember 1. BCD equivalent of 43 2. value of K for stability of a system from a given equation 3. transformer connection for darlington connection 4. damping of balastic galvanometer 5. advantage of chart-pen recorder over CRo 6. CRO - how to change bandwidth 7. questions on CRO construction 8. reverse saturation current of si diode 9. advantage of wire wound resistance over carbon resistance 10. core material for a small coil 11. max fanout-- TTL/ECL/CMOS/MOS 12. component of resistance of monolithic IC 13. functions of capacitors in multivibrators 14. to change a sawtooth signal into a square wave we use-- schmit trigger/ schottkey diode/ zener diode 15. relation b/w á & â in transistor ckt 16. function of SiO2 layer in fabrication 17. 3 questions on ODD MAN OUT

2 Answers   HCL, L&T,

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what is dc moter.

0 Answers   Jindal Steel and Power, Lupin,

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Steve said that "An eddy-current probe works by passing an alternating current through a coil of wire and measuring the coil’s impedance" while we are using -24 Volt DC , So I am confused about DC and AC. Plz .

2 Answers   Jindal, Sadara Chemicals,

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what is the output of conductivity sensor and PH sensor?

3 Answers  

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HOW TO CALIBRATE A PRESSURE SWITCH?

7 Answers  

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what is the safety integrity levels (SIL)

1 Answers  

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What is the right procedure for adjusting the gap voltage of bently nevada vibration sensor?

2 Answers  

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What is DCS and PLC scanning time?

5 Answers  

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Where we cant instal mass flow meter.

1 Answers  

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Explain signal isolator

0 Answers  

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in current transmitter why we use 4-20ma ???

2 Answers   IMCO, IOCL,

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