Answer / laxmidhar ,nmiet bbsr

we need,
miliamp source(giving supply to i/p)
i to p converter(pressure signal to control valve)
air supply(for input to i/p and control valve)
multimeter(miliamp check)
small screw driver(for adjust zero and span)
and check

4ma for 0
8ma for 25%
12ma for 50%
16ma for 75%
20ma for 100%

Answer / ramkumar

We can calibrate the Controlvalve by using the mA feeder
(make-DRUCK).while calibrating the I/P using mA calibrator
error occurs adjust Zero and span in the I/P .

Answer / uprabhagaran

MA sourse

Answer / zuheir beilouni

Use a current source to calibrate the I/P converter error ,
but if the error was in the valve , calibrate the valve
positioner using Wallace and Tiernan calibration box or for
fast calibration couple a monostat gauge to calibrate and
if both were ok problem lies in the solenoid then check the
supply to it

Answer / biju

We can calibrate a control valve by connecting a HART/FF
communicator to the valve and then doing Autocalibration
through the instrument...

Answer / mustafa ahmad

mA SOURCE & HART COMMUNICATOR WILL USE FOR THE CALIBRATION
OF CONTROL VALVE .WHEN U CALIBRATE THE CONTROL VALVE THAT
TIME U FOUND ANY ERROR . YOU DO AUTO CALIBRATION BY HART
COMMUNICATOR . WHEN AUTO CALIBRATION WILL FINISH , YOU DO
THE STROKE CHEK BY HART COMMUNICATOR OR mA SOURCE

Answer / dhanasekaran c

Depends upon the valve. Pneumatic calibrator for 0.2to
1.00kg/cm2 Valve.For Electronic positioner( 4-20ma) We can
use Loop calibrator. For Smart type of positioner fixed
valves smart calibrator 275 or 375 or 475(latest) must be
used. Field bus MC5 hand held calibrator can be used.

Answer / antionyo

control valve calibrator

Answer / abinecious

SCANDURA

Answer / janardhan reddy

we can calibrate the control valve by using the dead weight
tester and transmitter and pid controller,

We have a Yokogawa Micro-XL DCS, which is having around 300 I/O, but whenever there is any wire gets grounded in field, the 24v supply to all loops gets dipped & all the indications at DCS goes to IOP(shows input open), at present we have fixed 500mA fuses in all the lines but which does not working. Does it required to replace with lower amps fuse, then how much or is there any other solution for this.

2 Answers  

Draw a wheatstone bridge circuit showing supply, meter and 3 wire RTD connection

0 Answers   CCIE,

what is the principal of coriolis mass flowmeter

1 Answers  

How does SmartPlant Instrumentation interface with physical design (3D modeling)?

0 Answers  

I need the intools training institute address in india. Intools subject oriented local authors books.Refer me plz

3 Answers  

Sir , i have completed my M.Sc In Instrumentation and presently working in Maintenance department 3 yrs Exp , is there is any possible for work in offshore ..

0 Answers  

steps for installing orifice plate?

0 Answers   Bhushan Power Steel,

WHAT IS D/O D/I AND A/O A/I PLZ EXPLAIN

2 Answers  

How can we say that accuracy of measurement increases by using 3 or 4 wire RTD? because for example: If resistance of RTD element is say r ohms and Resistance of the cable from transmitter to RTD is R ohms And if 4 wire RTD is used, ____._____________________ R ohms | |_____._____________________ R ohms / \ / r ohms \ \ | |______.__________________ R Ohms | |_______._________________ R ohms Then the actual resistance measured will be: Total = r + R/2 + R/2 = r +R Ohms Note: r+R instead of r ohms. hence error

2 Answers  

What is the meaning of the term "g force"?

3 Answers   Reliance, Saint Gobain, Thermax,

What is input and output of vaiberation transmitter and what is its unit.

4 Answers   SMH,

How to convert gpm into inches of eater.I nerd formula with example so pls help me.

1 Answers