in the construction field why hook up s.s.tubing for
transmitter using upto 6mtrs of closed loop, but y not
open loop nomore restriction
- 5 Answers
- 9257 Views
- Sabic, I also Faced
- E-Mail Answers
Answer Posted / www.islamqa.com
I think it's related to system response time, 6 meters
limitation to make the feedback pressure signal built up
through the pipeline and arrive to I/P or controller in
suitable time.
open loop has no feedback so there's no limitations.
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
ahmedsabry.online@gmail.com
CELL.: 00 2 0121367310
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?
send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com
Derive capacitance to 4-20ma conversion formula / relation in capacitance type pressure sensor?
How can we use feedback signal frm rtd for monitoring and in dcs for controlling ,then which type of rtd is sutaible 2 , 3,4wire and why ?
Gas equation
What is feed factor and its Importance in cement industry? How we can solve feed factor?.
any questions on motor and energy conversions machines?
how to measure oxygen which methods are using?
Why do we have earthing cable in branch cable and shield in the same cable?
selection criteria of control valve? and selection criteria of actuator explain in brief?
How to Calibrate Flow Switch in field
the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove
In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.
how to calibrate electro pneumatic positioner 8013 mil controls ltd ?gsr
1)How many tpes of vibration probe and how many tpyes of vibration. 2)how we can calibrate a vibration probe with tk3 3)what is RMS value in vibration measuring application and how we calculate it.
