| Other Instrumentation Interview Questions |
|| Asked @
|what is the difference between SMART and tipical transmeter ?
|what is plc? breif explain
|1,why we use 4-20 ma output of all instrument qhy not use 0-
2,what is the different between PLC & DCS.
3,how can we meaure maximum span of new flowmeter if not
given any information.
|Foe selecting control valve if i have the min,normal & max
data of flow rate,inlet pressure& outlet pressure,inlet
tem.&density than how can i assure that these data are
correct,pl. let me know if therew there is any method to
check it.& also how we assure that the Cv we get from this
data is suitable for valve for controlling require flow.
|Why we use 250 ohm resistor in series with HART protocol
|THERMOCOUPLE IS A TRANSDUCER BUT RTD IS NOT TRANSDUCER WHY?
BOTH TAKING HEAT AS A INPUT AND GIVING mV & OHMS OUT PUT RESPECTIVELY.
|why 1 to 5 vdc is used for output measurment
|Why ues 250 ohms Resistor during hart type instruments
calibration with hart protocol in details ?
|7. What are tri-state devices and why they are
essential in a bus oriented system
|what is the formula for calculating milliampere at different
pressure points for eg 4-20 ma = 3-15 psi but if i have to
check the ma at 4.6 ma?
|different between calibration range and instrument range ?
|How to force the bit in GE Mark V?
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