Comecta FA-2204B User manual

Balance
Model FA-2204B Cod. 5830039
INSTRUCTIONS MANUAL

FA2204B Electronics Balance
Operation Instructions

1
Contents
I. Outline ...........................................................................................................2
II. MainTechnicalParameters.........................................................................3
III. DrawingsforBalance Installation..............................................................4
IV. Operating.....................................................................................................6
1Preparation..........................................................................................6
2Operation.............................................................................................6
3Start .....................................................................................................8
4Balance Calibration ..........................................................................10
5COUCountFunction........................................................................11
6UNTUnitConversion .......................................................................12
7INTIntegratingTimeAdjustment....................................................13
8ASDSensitivityAdjustment..............................................................13
9PRTOutputModeSetting................................................................14
10 OperationofWeighing,Taring,Add Objects, ReadDeviations....15
V.Maintenance andTroubleshootingoftheBalance.....................................17
Ⅵ.DataInterface............................................................................................19
Ⅶ. Balance SerialSingle(RS232C)................................................................19
Ⅷ.RandmoAccessories..................................................................................20

2
I. Outline
Thebalance isamultifunctionelectronicbalanceadoptingMCS-51 seriessinglechip
microprocessor.Theweighingcanbeautomaticallycalibrated,theintegratingtimecanbe
adjustedand thesensitivitycanbeselectedlikecommonintelligentelectronicbalances.
Besides,it hasthreeweighingsystemsforusers choice:gram,metriccaratand troy ounce
(themetriccaratand troyouncearefortheexportedbalance).Thedatainterfaceis
providedwithRS232Cuniversaltwo-wayserialinterface,whichcanbeconnectedtothe
microprocessorand serialprinter(e.g., TPμP-T16S,etc.).Thedataoutputhasalsofive
modesforusers choice, includingtiminginthree steps,continuous, andmanualoutput.

3
II. Main Technical Parameters
Model FA2204B
Weighing range 0to 220g
Actual Scale Division Value 0.1mg
Taring Range 0to 220g
Repeatability Deviation 0.0002g
Accuracy Degree
Stable Time (typical) ≤8s
Integrating Time (adjustable) 2.5/5/10s
Pan Diameter (mm) Φ80
Overall Dimensions (mm) 350×210×346
Net Weight 8.5kg
Power Supply AC 100V-240V - 50/60Hz
Power Consumption 12V.A
Auto Calibration Weight Range 200g
Warm-up Time 180min

4
.DrawingsforBalance Installation
23 4
1.pan2. datainterface 3.levelbubble4.outerpowersupplyconnector
1

5
56
5.adjustablelevelleg 6. smallroundcover(hookinside)

6
IV.Operating
1Preparation
lUnpacktheboxandremoveall thepacking.Takeoutbufferspongeinthewind-proof
coverand install pan.
lPutthebalance on a stableworking tablefree fromvibration, sunshineand airflow.
lAmbienttemperature:
Balance ofgrade:
:20℃±5℃withafluctuationoftemperaturenot
greaterthan1℃/h.
:20℃±7.5℃withafluctuationoftemperaturenot
greaterthan5℃/h.
lRelativehumidity:
Balance ofgrade: :＜50%～75%；:
:＜50%～80%.
lOperatingvoltage:AC100V~240V, 50/60Hz.
2 Operation
lCheckthelevelmeterbeforeoperation.If thebubbleisnotin thecenter, adjustthelevel
legstomakethebubbleinthecenter.
lThebalance adoptssofttouchbuttons,soit canbecontrolledwithmulti-keyboards.Itis
easytooperate.Functionchangeand selectioncanberealizedsimplyby depressingthe
correspondingbuttons.
lIntroductionofthekeyboardon thepanel:
“ON”–keytoswitchonthedisplayscreen
“OFF”–keytoswitchoffthedisplayscreen
“TAR”–keytosetzero(taring)
“INT”–keytoadjusttheintegratingtime

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“ASD”–keytoadjustthesensitivity
“CAL”–keytocalibratethebalance,confirmthecountfunction(fordetail see §5),
“COU”–keyofcountfunction
“UNT”–keyforunit conversion(Fordetail see operationin §6)
“PRT”–keyofoutputmodesetting
lIntroductionofLCDpanel(see thesketch):
1. Integratingtimeicon---- whentheintegratingtimeisadjustedas “—INT—1”,
onlyawaveisdisplayedonthebuttonintheiconframe.
2. Sensitivityadjustmenticon---- whenthesensitivityisadjustedas “—ASD—1”,
onlyadropisdisplayedontheleftintheiconframe.
3. Displayflickerswhentheusersetsand selectsthemenu.
4. Displayflickerswhentheuserisaskedtowait (pressingkey “CAL”inthecount
functionexcluded. Fordetail see operationin §5).
5. Printingoutputmodeicon---- whenthemodeof “—PRT—1”isselectedonlya
penisdisplayedontheleftintheiconframe.
6 –10. Weighingsystem--------e.g., “ct”iscaratinthemetricsystemand “oz”is
ounce forgoldandmedicine.
11. Weighingicon--------withtheweighingincreasesthevalueindicatedbythe
weightsincreasesprorata.Whentheweighing isfull,all thedisplayofthe
weightsequalsthedottedlinebelow.
12. Stabilitymark------- readingofthebalance isaccurateonlywhen “○” goesout,
otherwise,not.

8
SketchofLCD panel
Pleasewait
Pleasechoose
~
~
~%
g
PCS
Ct
OZ
,
11 10 9
7
8
6
1 2 3 4 5
12
3Start
lSelectanappropriatelinevoltageansetthevoltageswitchtothecorresponding
position.
lTurnonthepoweronandthebalanceisreadytorun(butthedisplaydoesn twork),
normallywarm-upisneeded beforethedisplaypanelcanbeoperated.Foraccurate
measurement,balanceofgrade needstobepoweredthree hoursforwarm-up,
whilegrated needsonehour.

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Foremergency,weighing canbedonethroughcalibrating thebalancebeforeuseforaccurate
measurement, ifthewarm-uptimeisnotenough.
lFunctionofthekeyboard
“ON”displayson
Depress slightlythebutton “ON”, thedisplaywill belighted.
Checkthefunctionofthedisplay, about2 secondslater, themodelofthebalance will be
displayed:
Forexample:
—2204—
Thentheweighingmode:
0.0000g
“OFF”displaysoff
Depress slightlythebutton “OFF”,thedisplaywill goout(nowthebalanceisstill powered).
Ifthebalancewill notbeused fora long time, thepowerplug should betaken off.
“TAR”setszero
Putthecontaineronthepan, theweightofthecontainershouldbedisplayed:
+18.9001g
Depress “TAR”button,thedisplaywill gooutand thedisplaywill beall zero,thedisplay
will showthatthecontainerweighthasbeenremoved:
0.0000g
Whenthecontainerisremoved, anegativevalueofthecontainerweightwill bedisplayed:

10
-18.9001g
Depress “TAR”again, thedisplaywill beall zero, i. e. thebalance clears:
0.0000g
4Balance Calibration
Afteralongperiodofstorage,movement,changeofenvironment,theweighingunit maynot
bedisplayedonthepanel,oneweightmaybedisplayedontheleftbuttonofthedisplay
panelwhenthereisnoanyweightingcarriedout.Normally,thebalanceshouldbecalibrated
beforeuseinordertoobtainprecisemeasurement.
lPreparationforthebalancecalibration:
Takeawayall theobjectstobeweighedonthepan.Forbalance FA2204B,asan
example, setmodesCou-0, INT-3, ASD-2, and UNT-0 (default whenbalanceison).
Depress slightly “TAR”forclearingthebalance.
lCalibration
Depress slightly “TAR”will beontheflash-displayof “CAL-200”.Releasethe
button, indicatingacalibrationisneeded with astandardweightof200g.Therefore,
puttheprepared200gstandardweightonthepan,waitingstatusof “Pleasewait”
appearsonthedisplaypanel,theflash-displayof “CAL-200”willstop.After
severalseconds, “200.0000g”will displayed,while “Pleasewait”goesout.
Removethecalibrationweight,thedisplayshouldindicate0.0000g.The
calibration isfinished.Ifnot,clearonce againandrepeattheaboveprocedures.
(Twiceofcalibrationarerecommendedinordertogetaccurateresult).Thedisplay
sequence ofthecalibrationisshowninthefigurebelow:
0.0000g
CAL
-
200
-------
200.0000g
0.0000g

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5COUCountFunction
Thebalance hasafunctionofcounting.Theaveragenumbersareinfourstepsof5, 10, 25,
and 50.
Thesettingofaveragenumbers:
Onlydepress “COU”and hold, “Pleasechoose”will appearonthedisplaypanel,whilethe
menudisplaywillbecirculatingcontinuouslyasthefollowing:
Cou-00 Cou-05 Cou-10 Cou-25 Cou-50
Itmeanstheaveragevalueof5, 10, 25, and 50 objectsrespectively.
If anormalweighingfunctionisrequired,releasewhenCou-00 displays,andwaitingstatus
“Pleasewait”will beindicated, atlast0.0000gweightingstatuswillbeindicated.
If theaveragevalueoffiveisrequired,releasewhen “Cou-05”displays, “Pleasewait”
appears,thenput5objectson thepanwhen “Pleasewait”goesoff.Now “Pleasewait”
appearsagain.Depress “CAL”onceimmediatelybefore “Pleasewait”goesoff again.Then,
waitingstatusof “-------”and “Pleasewait”appearagain.Afterseveralseconds,5will be
displayed.Takeawaytheobjectstobeweighed, “0”will bedisplayedonthepanel.Atthat
timethecountingofthesameobjectstobeweighedcanbedone.(Attention:theweightof
theobjectstobeweighedmustnotbegreaterthanthemaximumweighingrangeofthe
balance).
If youaverageover10, 25, oreven50 objects, thentheaccuracyofcountingwill behigher.

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6UNTUnitConversion
Depress “UNT”buttonandholdthedisplayof “Pleasechoose”willappearonthepanel,
whilethefollowingmenuiscirculatingcontinuously：
—Unt—0 —Unt—1—Unt—
2
When theunit youneedappears, letgo, then it shows “pleaswait”and turnsintotheunit you
setup.
“0”meansthevalueisexpressedin “gram”, “1”meansthevalueisexpressedin “metric
carat/ct”，and “2”meansthevalueisexpressedin “troy ounce/oz”.

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7INTIntegratingTimeAdjustment
Depress “INT”buttonandhold; “Pleasechoose”will appearon thepanel,whilethedisplay
isshownasthefollowingmenu,circulatingcontinuously:
—INT—0
—INT—1
—INT—2
—INT—3
Whenthemodeyouneedappears,letgo,thenit shows “pleaswait”and turnsintothemode
yousetup.
Thecorrespondingintegratingtimeisasfollows:
-INT-0 fast, -INT-1 shorter, -INT-2 short, and-INT-3 longer.
8ASDSensitivityAdjustment
Depress “ASD”buttonand hold, “Pleasechoose”willappearon thepanel, whilethedisplay
isshownasthefollowingmenu,circulatingcontinuously:

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—ASD—0
—ASD—1
—ASD—2
—ASD—3
Whenthemodeyouneedappears,letgo,thenit shows “pleaswait”and turnsintothemode
yousetup.
Thecorrespondingsensitivitywill be:
-ASD-0 thehighest, -ASD-1 high, -ASD-2 higher, and-ASD-3 low.
Where-ASD-0isusedfortestrunandnottobeusedbytheusers.HereisalistofASDand
INTforuser sreference only.
Thefastestweighing: INT—1 ASD—3
Normal: INT 3 ASD 2
Withundesirableenvironment: INT—3 ASD—3
9PRTOutputModeSetting
Depress “PRT”and hold, “Pleasechoose”will appearonthepanel,whilethedisplayis
shownasthefollowingmenu, circulatingcontinuously.

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—PRT—0
—PRT—1
—PRT—2
—PRT—4
When themodeyouneedappears, letgo,thenit shows “pleasewait”andturnsintothemode
yousetup.
PRT-0 isthemodeofindefinitetimeoutput; slightlydepress “PRT”once,theweighingresult
will beoutputontheoutputinterface once.Attention:Atthistimeyoushoulddepress the
buttonslightlyandquickly,otherwise, thenextoutputmodewill bedisplayed.
PRT-1 outputonce everyhalfaminute.
PRT-2 outputonce everyminute.
PRT-3 outputonce everytwominutes.
PRT-4 outputcontinuously.
10 OperationofWeighing,Taring,Add Objects, ReadDeviations
lWeighing:
Afterselection oftheabovemodesbytheuser,(thedefault whenthebalance is
poweredis: “INT-3, ASD-2,and PRT-4)depress “TAR”,zerodisplays.Puttheobject
tobeweighedon thepan.Whenthenumberisstable,i.e. “0”and “Pleasewait”
indicationontheleftofthedisplaygoesout,thenumberdisplayedwill betheweight
oftheobject.
—PRT—3

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lTaring:
Putthecontaineronthepan,theweightwilldisplay.Depress “TAR”,zerodisplay.That
istaring.Puttheobjecttobeweighedintothecontainer,thevaluedisplayedisthenet
weightoftheobjecttobeweighed.
lAccumulativeweighing:
Puttheobjectstobeweighedonthepanonebyonewithtaring methodandtareand
clearforeachone.Takeawayall theobjectstobeweighed, theabsolutevaluedisplayed
isthetotalweightoftheobjectstobeweighed.
lAddObjects
Setthemodeof “INT-0, ASD-0”and putthecontaineronthepan,thentare.Addthe
objectstobeweighed(liquidorlooseobjects)intothecontaineronebyone.The
continuousreadingvaluecanbeobtainedquickly.Whentheaddedobjectsreachthe
requiredweight, “0”and “Pleasewait”indicationonthelefton thedisplaygoesoutand
thenumberdisplayedistheweighing valuerequiredbytheuser.Whenaddingthe
mixedobjects, thenetweightofeachobjectcanbemeasuredbytaringmethod.
lReadingdeviations:
Putthereference weight(orsample)onthepanandtare.Thentakeoffthereference
weight.Thenegativevalueofweightdisplays.Puttheobjecttobeweighedon thepan.
Thecorrespondingplusorminusdeviationwill display,comparingtheweighedobject
withthereferenceweight.
lUnload:
Loosethescrewsofthebottomcover,revealthehook.Putthebalance onaworking
tablewithahole.Levelandcalibratethebalance.Anobjectcanbeweighedwiththe
hook.

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V.Maintenance andTroubleshootingoftheBalance
lMaintenance:
Thebalanceshouldbeusedcarefully.Cleanthepanand thecasefrequentlywithsoft
clothandtoothpaste. Don twipethebalance withstrongagent.
lTroubleshooting:
No. Trouble Cause Remedy
1
Display
not
fullylit
·
Powerinnoton
·Displayswitchisnoton
·Instantinterference
·Microfusebroken
·
Checkandturnitonagain.
·Depress “ON”button.
·Switchonagainandreplugpower
cord.
·Replace thefuse.Ifbrokenagain,
sendit totheservicecenter.
2
Displaythe
upperhalfonly
“-------”
·
Overload
·Thecalibrationinthe
internalmemorymaybe
damaged
·Thepanisnotinstalled
correctly
·
Reduce theloadimmediately.
·Recalibrateaccordingtotheabove
procedures.About8secondsafter
thestandardweighthasbeenput
on,thecalibratedresult maybe
displayed.Acertainstabletimeis
necessary.
·Takeoutthepanandreinstall the
pan.
3
Displaythe
lowerhalfonly
“-------”
·
Thepanisnotinstalled
correctly
·Withoutpan, toolight
·
Takeoutthepanandreinstall the
pan.
·ditto.
4
Theweighing
result isnot
stable(data
changed
swiftly)
·
Duetoairflow
·Theworking tableisnot
stable
·Theintegratingtimeistoo
short
·Roomtemperature
fluctuates
·
Closethewindproofcover.
·Place thebalanceonastable
workingtable.
·Selectlongerintegratingtime.
·Controlroomtemperature.

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5
Theresult isnot
correct
·
Notzeroing before
weighing
·Usethebalancewithout
calibration orthe
calibration weightisnot
accurate
·Thelinevoltageisnot
correct
·
Depress
“TAR”
button.
·Recalibratethebalance.
·Changetothecorrectvoltage.
6
Displayremains
atacertaindigit
orindicates
nonsense
symbol
·
Possibleinstant
interference
·Wronglinevoltage
·
Turnonthebalanceonce againor
replugthepowercord.
·Changetonormallinevoltage.
7
Thestablemark
“o”and “Please
wait”do notgo
out
·
Ahigherba
lance
sensitivity
·Undesiredenvironment,
suchasstrongairflow,
vibration,orsevereroom
temperaturefluctuation
·
Settoalowersensitivity.
·Improveenvironment.
8
Remainat
waitingstatus
“Pleasewait”
·
Thebalance positionisnot
correct,e.g.withstrongair
flow,vibrationorgreat
fluctuation ofroom
temperature
·Theselectedsensitivityis
toohigh
·
Improvetheenvironment.
·SettoASD-3.
9
“Err
-
1”
or
“Err-2”displays
·
Instantinterference
·Somethingwrongwiththe
balance
·
Turnonthebalanceonce againor
replugthepower.
·Sentit totheservice center.
10
“CAL
-
Err”
displays
·
Thereisanobjectonthe
panbeforecalibration
·Calibration weightisnot
correct
·Notclearbefore
calibration
·“CAL”buttonispressed
beforeweighingmode
displayed
·
Takeawaytheobject,clearand
recalibrate.
·Clearand recalibrate.
·ditto
·Changetoweighingmode.
11
Weighingunitis
notdisplayed
onthepanel
and thereisa
weighticonon
theleftbelow
ofthepanel
·
N
otcalibrated
·Thecalibratednumberin
theinternalmemoryofthe
balance hasbeenerased
·
Calibratethebalance.
·ditto
12
“Cou
-
Err”
displays
·
Noconstantbesetbefore
operatingcounting
function
·Overloadwhensetting
constant
·Underloadwhensetting
constant
·
Setaveragenumber.