Answer Posted / jayaraj
1}///in earlier days we had used BJT transister in signal
conditioning circuits for amplification purposes so in BJT
transfer characteristics 4 to 20 milli amps is a linear
region,....but now-a-days we re using cmos only.... as a
convention only we are following this 4-20 range
2}///another reason...for not using 0 milli amp
coz if we use like that we cannot distinguish between true
signal zero and dead zero(break in wires)
| Is This Answer Correct ? | 46 Yes | 2 No |
Post New Answer View All Answers
what is o2 analyzer and how it measured ,what is the role of this analyzer in cfbc boiler...
Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor
please any body have most important data for study for saudi aramco test of instrument QC thanks email shahnaveedullah@gmail.com
Explain about safety integrated level protection? . How it was differ from other protections ?
what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?
What are different type of instrument cable
1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?
hi sir yhis is zahid ali i am preparing for the jspl at oct.4.please send me the recently updated sample paper.
How to Calibrate Vortex Flow transmitter in field
We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.
What is the diffrence between ff tx and non ff tx
Linear amplifier.
give me the formula for analog to digital converter and also d to a converter
Instrumentation Safe Guarding test. How to determine the interval time of the test. eg:Halfyearly,Every year,Every three years etc.
anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me
