Answer / s

Hook-up Diagram having installation details like
vaves,tee,elbow sizes.It is a detailed diagram for
Particular equipment installation which is not available in
P&ID.

Answer / cpo

SS tubing come in standard max length 6m

Answer / chepin

S answer is right. Could some one pls share sample of the
hook up drawing.

Answer / 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

Answer / ladla

In open loop there is no feedback

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

2 Answers  

why we use 0.2 to 1.0 kg/cm2 output in control valve

4 Answers   GNFC,

hello dear i have faced problem in drum level transmitter. the problem is when i engrize the meter meter shows 100% but the actual level 40 or something plz suggest me

7 Answers  

Why three wire is using with a RTD?

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what u mean by speed control in turbin? how it was working?

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what is Instrumentation?

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which type of signal used in instrument?

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2 Answers  

how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

0 Answers   United Phosphorus,

what is loop1 and loop2 in MTS LT?

0 Answers   SPGC,

Why DP transmitters are subjected to high static pressure test of 100 bar. Though they will be used for very small pressure range

4 Answers   HPCL,

calibration of instruments.

11 Answers   ONGC,