05- Gas Meter Calibration-Individual Meter

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Faculty of Chemical & Natural Resources Engineering

BKG3721

Fuel & Combustion Lab

Experiment 05

GAS E!E" CAL#B"A!#$% #%'#(#')AL

E!E"

%ameatri* %o+Group,ro-ramSe*tion'ate

Sem+ 11 Session 2012.2013

1+0 $b/e*ti e


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BKG3751 Fuel an Combustion Lab Sem ## 2012.2013

To provide hands on experience and enhance the understanding onthe principles of gas meter calibration using the reference meterconcept. The system used in this experiment is theSOLTEQ/CL /!"!#/$$ Calibration Station.

2+0 #ntro u*tion

The calibration process as conducted in this experiment follo%s theinternational standards as practiced by the industry. The experienceand exposure gained from doing this experiment %ill enhance theunderstanding of gas meter design and operation.

&n this particular experiment' system stabili(ation is closely lin)ed%ith the time period and steady state process. &n order to reachstabili(ed supply of the compressed air medium' buffering is re*uiredto ensure consistent supply by maintaining constant do%nstreamdemand. &f large fluctuation occurs in the do%nstream demand'stability might not be reached. y ensuring sufficient gas supply andappropriate flo% control' operation accuracy and verification of gasmeter should be achieved.

&t is important to remember that since the supply pressure by theportable gas cylinder is relatively high' pressure regulator must beemployed and appropriate safety precaution exercised. The controlof opening and closing of the isolation valve should be madecarefully.

The second stage regulator is employed to ensure gas supply doesnot exceed the maximum operating pressure of %et type gas meterto about "# + %.c.. Touch,screen -C installed should be operated onlyafter basic operation of the system is thoroughly understood.

lo% control is by means of using the appropriate hand valves. Eachpressure sensing line should be made up to al%ays in the openingposition. The closing and opening of isolation hand valves shouldfollo% the instruction belo%.

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Note: Air Compressor will immediately stop, once the Air ReceivingUnit reaches its setpoint. The compressor will be automaticallytriggered if this pressure is reduced .0

3+0 Experimental ,ro*e ures

3+2 #n i i ual (eri i*ation o 'iap4ra-m Gas eter

3+2+1 'iap4ra-m eter %o+1 an "e eren*e eter

a. $ecord the initial reading of reference %et typemeter and meter no.". $ecord also the reading ofthe pressure and temperature of the relatedposition using online touch,screen system.

b. Open isolation valves nos 1 2,S3T' 2,$E ' 2,"' 2,4'2,5' 2,6' 2,"4 and ,"7.

c. Open the gas supply system from cylinders.d. Ensure isolation valves 2,8' 2,#' 2,7' 2,9' 2,:' 2,

"!' 2,""' 2,"8' 2,"# and 2,LO3; is fully closed.e.


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a. $ecord the initial reading of reference %et typemeter and meter no.4. $ecord also the reading ofthe pressure and temperature of the relatedposition using online touch,screen system.

b. Open isolation valves nos1 2,S3T' 2,$E ' 2,8' 2,#'2,7' 2,6' 2,"4 and 2,"7.

c. Open the gas supply system from cylinders.d. Ensure isolation valves 2,"' 2,4' 2,5' 2,9' 2,:' 2,

"!' 2,""' 2,"8' 2,"# and 2,LO3; is fully closed.e.


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g. 3t the end of 4 minutes record the pressure'temperature and meter reading at reference meterand meter no.8.

h. 3t the end of # minutes repeat the aboveinstruction g0.

i. Close isolation valve 2,LO3; at this particularmoment.

=. Stop the stop %atch.). Stop the gas supply from the cylinders by closing

the valve 2,S3T.l. Tabulate results.

3+2+ 'iap4ra-m eter %o+ an "e eren*e eter

a. $ecord the initial reading of reference %et typemeter and meter no.#. $ecord also the reading ofthe pressure and temperature of the relatedposition using online touch,screen system.

b. Open isolation valves nos 1 2,S3T' 2,$E ' 2,8' 2,5'2,6' 2,"!' 2,"" and 2,"7.

c. Open the gas supply system from cylinders.d. Ensure isolation valves 2,"' 2,4' 2,#' 2,7' 2,9' 2,

:' 2,"4' 2,"8' 2,"# and 2,LO3; is fully closed.e.


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+1 #n i i ual (eri i*ation o 'iap4ra-m Gas eter

!able +1+1 'iap4ra-m eter %o+1 an "e eren*e eter

Temperatur e

(oC)

Pressure(bar)

Initial Volume, V 1(L)

Final Volume,Vo(L)

Vo-V 1(L)

First Two Minutes

Meter No1

Ref Meter

Four Minutes

Meter No1

Ref Meter


Temperatur e

(o

C)

Pressure(bar)


Final Volume,Vo

(L)

Vo-V 1(L)

First Two Minutes

Meter No!

Ref Meter

Four Minutes

Meter No!

Ref Meter

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Temperatur e

(oC)

Pressure(bar)


Final Volume,Vo(L)

Vo-V 1(L)

First Two Minutes

Meter No"

Ref Meter

Four Minutes

Meter No"

Ref Meter

!able +1+ 'iap4ra-m eter %o an "e eren*e eter

Temperatur e

(oC)

Pressure(bar)


Final Volume,Vo(L)

Vo-V 1(L)

First Two Minutes

Meter No#

Ref Meter Four Minutes

Meter No#

Ref Meter

!able +1+5 'iap4ra-m eter %o5 an "e eren*e eter

Temperatur e

(oC)

Pressure(bar)


Final Volume,Vo(L)

Vo-V 1(L)

First Two Minutes

Meter No$

Ref Meter

Four Minutes

Meter No$

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5+0 A%AL S#S

-lot the percent error and percent correction against the meter y forthe simultaneous case on the graph paper provided. $epeat the plotfor the individual case on the same graph paper.

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Fi-ure 18 S*4emati* 'ia-ram o Flo9 Control S:stem

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05- Gas Meter Calibration-Individual Meter

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