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in a electronic controller why we are using 250 ohm resistance in input signal?is i/p is necessary in control valve when we are using electronic controller give details?
IOCL,
3 9897During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????
1 4782Could you explain to me the enraf (servo gauge) mechanism. How it works ? and how it is working on archimedes theory while it's not immersed into the surface? and how can we calibrate it ? Thanx
1 5571Why Differential pressure transmitter is located below the tappings points for steam & condensible vapor flow measurement application?
2 7352how to connect 3 wire 4-20 mA transmitter in Plc system PLC system and how explain how the measuring data communicate with plc system.
1 17024how can we measure the pressure in underground cooling water pipeline by using pressure transmitter?what about the tapping position?
2 6815IS IT POSSIBLE TO CALIBRATE A LEVEL TRANSMITTER INDICATOR(ABB) USING HART COMMUNICATOR.? I MEAN TO CHANGE FROM ONE UNIT TO ANOTHER WITHIN INDICATOR (EG. INCH TO FEET)...? PLZ NOTE THAT I HAVE MADE THE UNIT CHANGE IN TRANSMITTER USING HART COMMUNICATOR..BUT WHAT ABOUT THE INDICATOR..?
2 6683Post New Instrumentation Questions
why I need valve guard and whats different between guard and positioner ??
pls give me presant awerness quistion and answer in my emailid.
I want to measure and control level in tank of size 10*5 filled with gasoline, so plz give me the solution with clear details. how to select transmitter and sensors.
i am having information technology branh ....... can i prepare for psu exam
Draw block digram for well head from well to shipping pump?
what is the importance of CV in the control valves? how it is calculated?
Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com
what is a good line as ic engineer as maintenance ,oc, project, calibration ,validation engineer?
Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?
what are the selections available in configuring a burnout protection of a controller? thanks
If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?
How it the difference between force balance system and dispalacement balance system?
i have used level transmitter in starch cooking preparation tank. tank total height 2mtr.sometime LT display shows some error value when tank is fully empty and diaphragm side i already checked okay no problem in diaphragm area. field cable checked 24volt and mA shows correct value while tank empty mA is 4mA. 4mA i needed that 0% but display showing 10% or 15% percentage values are varying continously please give any good solution for me.....
Why do we have earthing cable in branch cable and shield in the same cable?
what are the diff. in servo and regulatory control?
