Extech Instruments 382275 User manual

Type
User manual

This manual is also suitable for

UserManual
Model 382275(120V)
382276(230V)
SingleOutputLaboratoryGrade
SwitchingDCPowerSupply
AdditionalUserManualTranslationsavailableatwww.extech.com
382275_382276-en-GB_V4.7 1/17
2
Introduction
CongratulationsonyourpurchaseoftheExtech382275(120V)or382276(230V)SingleOutput
LaboratoryGradeDCPowerSupply.
Thedualaction(coarse/finetune)rotaryencoderallowsforquickandprecisevoltageand
currentleveladjustments.Setting,changing,andcheckingthecurrentlimitlevelcanbe
performedeasilywithoutsparkingtheoutputpoles.
Theremotecontrolfeatureallowstheusertoremotelyperformthefollowingtasks:
OutputpowerON/OFF
VoltageandCurrentLevelAdjustments
Thethreeuserpresetsfacilitatequickaccesstofrequentlyusedvoltageandcurrentsettings.
Thispowersupplyisshippedfullytestedandcalibratedand,withproperuse,willprovideyears
ofreliableservice.
Safety
WARNING
Donotusethispowersupplywithelectricmotorsorforchargingpurposeson
electroplatingequipmentorsimilardevices.ReturnEMFandvoltagetransientsgenerated
byelectricmotorscandamagethispowersupply.Thispowersupplywasdesignedforuse
onelectronicequipmentonlyandnotintendedforuse
onelectricalequipmentofany
kind.
Donotusethispowersupplynearwater.
Donotoperateortouchthispowersupplywithwethands.
DonotopenthecasingofthepowersupplywhenitisconnectedtoACpower.
Referallservicingtoqualifiedservicepersonnelonly.
Beforereplacingthefuse,identify
andfixanyproblems.
Replacethefusewithafuseofthespecifiedtypeandrating.
CAUTION
Useagrounded3pinACsource.
Thisunitisintendedforindooruseonly.
Donotoperateorplacethisunitindirectsunlightorinahumidlocation
Avoidenvironmentswheredustordirtcanenterthepowersupplycasing.
Donotplacethepowersupply
nearaheatsource.
BeforepluggingintolocalACmains,checktheratinglabelatthebackoftheunitfor120Vor230V
operation.Themodel382275canbepoweredby120Vonly.Themodel382276canbepoweredby
230Vonly.
Donotblocktheventilationopeningsof
theunit.
Thisunitmustbeusedwithinthespecifiedrating;excessivecontinuousloadingmaycausedamageto
thepowersupply.
Thegaugesizeoftheinputpowercablemustbeatleast3“(0.75mm)andthetotallengthofpower
cablemustnotexceed118”(3m)
382275_382276-en-GB_V4.7 1/17
3
PowerSupplyDescription

1. PowerSwitchON/OFF
2. VoltageDisplay
3. CurrentDisplay
4. ConstantVoltageIndicatorLED
5. RearControlIndicatorLED(SwitchesONwheninPreset,RemoteControlorSet
Mode)
6. OutputVoltageControlKnob(Controlsboththemainandauxiliaryoutput
voltage)
7. OutputCurrentControlKnob(Controlsboththe
mainandauxiliaryoutput
current)
8. PositiveAuxiliaryOutputTerminal(Max.5Amps)
9. NegativeAuxiliaryOutputTerminal(Max.5Amps)
10. ConstantCurrentIndicatorLED
1
2
3
4
5
6
7
8
9
10
382275_382276-en-GB_V4.7 1/17
4
RearPanelDescription
1. MainOutput(20AmpsMax.)
2. P1,P2andP3RecallSwitch
3. CoolingFanforVentilation
4. ACinputPlugandFuse
5. RemoteControlConnector
6. ModeSwitch
ModeDescriptions
ModeSelection
Thepowersupplyhasfour(4)modesofoperation:NORMAL,PRESET,SETandREMOTE
CONTROLmode.SlidetheModeSelectionSwitchtothedesiredMode.Thepowersupply
defaultstotheNORMALMo de.
NormalMode
NormalMo deisthe fa ctory presetmode.Thepowersupply’soutputvoltage andcurrentare
controlledbythedualactionvolumekno bs.Pushtheknobstotogglethecoarseandfine
tuning;noticethesubtlechangesinbrightnessof therelatedLED.Adjusttheknobtothe
desiredvaluefirstwith
theCoa rs eadjustme ntandthenwiththe Finetuneadjustment.Turn
theCurrentknobgent ly inanydirectiontocheckthepresetcurrentleve l .Thedisplaywill
resumeitsnormalbrightnessafter afew secon ds toconfirmtheadjustment.
1
2
3
4
5
6
382275_382276-en-GB_V4.7 1/17
5
PresetMode
InthePRES ETmode,theRearControlLightisswi tchedONtoindicatethatthepanelvoltage
andcurre ntcontrolsaredeactivated.
Therearethreepresetoutputs,P1,P2andP3,selectableviatheReca ll Switch,locatedonthe
rearofthepower supply.
Thepresetvaluesarefactoryset
perthefollowingtable.
Presets OutputVoltage OutputCurrent
P1 5V Maximum
P2 13.8V Maximum
P3 25V Maximum
SetMode
IntheSETmode,theVoltageandtheCurrentvaluesforthethreepresets(P1,P2,andP3)ca n
beprogrammed.
1.
SettheMo deSwitchlocatedontherearof thepower supplytothe“SET”posit ion.
2.
SelectapresetusingtheRecallSwitch(settotheP1,P2orP3posi tion) .
3.
UsethefrontpanelVoltageContr o lKnobtosetthedesire dvoltageva lue .
4.
UsethefrontpanelCurrentControlKnobto setthedesire d currentva lue .
5.
Repeatthisprocedurefor theremainingpresetsifdesired.
6.
MovetheRecallSwitchfromtheSETtothePRESETpositiontostore changes.
Note:
Presetsresideinnonvolatilememorymeaningthatthevoltageandcurrentsettingsfor
eachpresetareretainedevenwhenthepowersupplyisswitchedOFF.
Caution:ChecktheoutputvoltageofthepresetinusebeforeconnectingtotheLoad.Tochecka
presetvalue,movetheModeSwitchtothePRESETpositionandthenmovetheRecallSwitchto
theP1,P2orP3position.The VoltageandCurrentsettingsforthecorrespondingpresetwill
display.
382275_382276-en-GB_V4.7 1/17
6
Toresetthepresetoutputstothefactorydefaultstate:
1. PressandholdtheVoltageControlknobfor30secondstoaccessthemenu.
2. Whenthedisplayisshowing‘CCO’,rotatetheVoltageControlknobuntilthevoltage
metershows‘rPr.
3. WiththeCurrentmetershowing‘no’,rotatetheCurrentControlknobuntiltheCurrent
metershows‘YES’.
4. PresstheCurrentControlknoboncetoconfirm.
5. PresstheVoltageControlknobtoexitthemenu
382275_382276-en-GB_V4.7 1/17
7
PowerupChecks
1.
First,checktheratinglabelofthepowersupplyandmakesureitcomplieswiththeACmainsvoltage
(120Vor230V).Next,settheModeSwitchlocatedontherearofthepowersupplytotheNormal
Position.
2.
Listenforthecoolingfanwhenswitchingonthepowersupply.Thepowersupplyperformsaseriesof
selftestchecksonstartupwhichincludestestingthecoolingfan. Thefanwillstopcompletelyaftera
fewsecondsafte rrunningathighspeedindicatingthatitisingoodorder.The
CV
,
V
and
A
lights
switchONdisplayingvoltageand0.0current.Tocheckthecurrentlevel,turnthecontrolknobone
clickineitherdirection.Thecurrentdisplayreturnsto0.0afterafewseconds.
TheTablebelowillustratestheSelfTest sequence:
SelftestdisplayandSequence TestDescription
Softwareversion
Displaycheck
C.V.Indicatorcheck
C.C.Indicatorcheck
Rearindicatorcheck
C.V.recheck
Testcontinuing
Overvoltageprotectioncheck
Overloadprotectioncheck
Overtemperatureprotectioncheck
Fancheck
Outputoff(remotecontrolmode)
382275_382276-en-GB_V4.7 1/17
8
Operation
UsingtheControlKnobs
Therotarycontrolknobsoffer fine/coarsetuningwithnotchedmovement.
1.
Pushtheknobstotogglebetweencoarseandfinetuning,noticethesubtlechangesin
brightnessoftherelate d LED.
2.
Adjusttheknobstothe desiredva luesbyusingcoarseandthenfinetuning.Thedisplay
willresumeitsnorma l brightnessafterafew secondstoconfirmtheadjustment.
ConnectingtoUUT(Unitundertest)
1.
Connecttheequipmenttothepowersupply.Red(+)isconnectedtothepositivepolarity
inputoftheUUTandBlack()isconnectedtothenegati ve polari t yinputof theUUT.
2.
SwitchONthepowersupplyfirst;thepanelmeter &greenCV Indicatorshouldswi tch
ON.
3.
SwitchONtheUUT;thepanelmeter&greenCVIndicatorshouldremainon.
4.
TheUUTisnowready.Whenoperationiscompleted,switchofftheUUTandthenthe
powersupply.
5.
WhendisconnectingthepowersupplyfromtheUUT,disconnecttheremotesensing
wirefirstandthendisconnecttheoutputcables.
WARNING:Donotuse this powersupplywithelectricmotorsforany reason or
for charging purposes on electroplating equipment or similar devices. Return
EMFandvoltagetransientsgeneratedbyelectricmotorscandamagethispower
supply. This power supply was designed for use on electronic equipment only
andnotintended
foruseonelectricalequipmentofanykind.
382275_382276-en-GB_V4.7 1/17
9
ManualZeroFunction
Thepowersupplyautomaticallyzeroesthecurrentmeteringuponpowerup.Tomanuallyruna
zerofunctionwithouthavingtocyclepower:
1. PressandholdtheVoltageControlKnobfor30secondstoopenthemenu.
2. RotatetheCurrentControlknobuntilthemetershowsthefollowing:
3. PresstheCurrentControlknoboncetoconfirm.Thedisplay willshow‘YES’.
4. PresstheVoltageControlknobtoexitthemenu.
382275_382276-en-GB_V4.7 1/17
10
RemoteControl
Remotecontrolismadepossiblethroughtheuseofthesupplied8pinRemoteCont ro l
connectorand22AWGwire.TheRemoteCo ntr o lfeatureoffe rsremo teadjustmentofvoltage
andcurre ntandoutputON/OFFswitching.
RemoteONOFFControl
TheRemoteControlONOFFfunctioncanbeactivatedinanyoftheoperationalmodes
(NORMAL,PRESET,REMOT E , andSET).Usingthesupplied8pinplugand22AWGwire,follow
theproceduresbelow:
1.
Removethe blackportionoftheremotecontrolconnectorplugbyremovingthe
screwasshown.
2.
IfPIN5isopen,theoutputisON.
3.
IfPIN5isshortedtoground(PIN4)theoutputisOFF.
4.
Whentheoutput isOFF , t
heC.V.&C.C.LEDwillflash.Thecurrentoutputvoltage
andcurrentsettingwillshowonthepanelmeter
.
5.
Theoutputvoltage&currentcontrolknobcanbeusedtoadjusttothedesired
valuewhentheoutputisoff.
RemoteVoltage/CurrentControl
Therearetwomethods(MethodAandMethod B;seebelow)fortheremotea djustment of
voltageandcurrent.EachmethodrequiresthattheCurrentremotecontrolportionbe
functionalotherwisetheunitwillbeintheCCmodeallofthetime.
1
7
2
8
1
3
4
5
6
382275_382276-en-GB_V4.7 1/17
11
RemoteControlMethodA:UsingtwoexternalvariableDCvoltagesources
Avariableexternalvoltagesourceof0~5VDCisfedintotheremotecontrolterminaltoadjust
theoutputvoltagelevel.
Warning!
Donotinputvoltagehigherthan5V,otherwisetheOverVoltageProtection(OVP)
willbetriggered.
1.
Ensure
thattherearenoconnectionstothemainpowersupplyoutputterminals
andthatthepowersupplyisOFF.
2. TestingtheVoltagecontrol‐
UseONLYtheVoltagecontrolfromPin2(Positive)andPin4(Ground).
3. SwitchONthepowersupply.
4.
Varythevoltagecontrolfrom0~5Vtocheckandverifythefulloutput
voltage
rangeofthesupplyas observedontheVoltagedisplay.
5.
Switch
OFF
thepowersupply.
6.
TestingtheCurrentcontrol‐
Shortthepowersupplymainoutputterminalswitha10AWGwire.
TurnuptheVoltagecontroltomaximum
TurntheCurrentcontroltominumum
TurnONthepowersupply
TurnupthecurrentcontrolandobservetheCurrentDisplay.
Turndownthecurrentcontrol
7. SwitchOFFthepowersupply
Removetheshortfromthemainouputterminals
RemoteSocketPINassignmentfor externalvariablevoltagesource
PIN FUNCTION NOTES
1 Internal+5VDC 50mAmaximum
2 VoltageAdjustment 0to5V
3 CurrentAdjustment 0to5V
4 Ground
5 OutputOFF Shorttoground
6 Unused
7 Unused
8 Unused
382275_382276-en-GB_V4.7 1/17
12
RemoteControlMethodB:Usingtwoexternalvariable5kohmresistors
1. Ensurethattherearenoconnectionstothemainpowersupplyoutputterminals
andthatthepowersupplyisOFF.
2. Preparetwo5kohmvariableresistorsasshowninthediagrambelowandusethe
wiresfromPins1,2,3and4asshown.
3. Switchthe
powersupplyON.
4. VarythePin2variableresistorfromoneendtotheotherendtocheckandverify
thefulloutputvoltagerangeofthepowersupplyasobservedontheVoltage
display.
5. TurnoffthePowersupply.
6.
TestingtheCurrentcontrol‐
Shortthepowersupplymainoutputterminalswitha10AWGwire.
TurnuptheVoltagecontroltomaximum
TurntheCurrentcontrol(Pin3resistor)tominumum
TurnONthepowersupply
TurnupthecurrentcontrolandobservetheCurrentDisplay.
Turndownthecurrentcontrol
7. SwitchOFFthepowersupply.
Removetheshortfromthemainouputterminals
RemoteSocketPINassignmentfor externalvariableresistors
PIN FUNCTION NOTES
1 Internal+5VDC
2 VoltageAdjustment Variablepartofresistor
3 CurrentAdjustment Variablepartofresistor
4 Ground
5 OutputOFF Shorttoground
6 Unused
7 Unused
8 Unused
382275_382276-en-GB_V4.7 1/17
13
oup
A
C.V.
C.C.
OverloadProtection
OUP:OverVoltageProtection
Thisunithasabuiltinovervoltageprotectionfeature . Intheeventofanoutput
voltageexceeding theallowablerange(refertothespecifi cationssectionfor ra nge
limits),protectionwillbetriggere d andtheoutputpowerwillbeswitchedoff.(OUP
warningappears).
Torese tthewarning,switchof fthe
power supplyandremoveallloading.Switchthe
unittoresumenormaloperation.Ifthisproblempersists,pleasecontactExtech
TechnicalSupport.
OTP:OverTemperatureProtection
Theunithousesathermosensorthatmonitortodetermineifanoverheating
conditionexists.TheOTPwarningwillappearonthedisplayandthe outputwillswitch
offinoverheatingconditiondoes exist.When thiswarningappears,switc h offtheunit
andremoveallloading.
Inthesecases,
che cktheloa dandtheoutputsettingsandthen allowtheunittocool
foratlea st30minutes.
Ensuretha ttheventilationopeningsarenotblockedandthatthepowersupplyhas
properclearance.Ensurethatthecoolingfanisoperational;neverusethepower
supplywithafaulty
coolingfan.
OLP:OverLoadProtection
NormallytheoverloadprotectionisprovidedbytheCCconstantcurrentmode.
However,iftheCCmodefailsitmaycauseseriousdamagetothetestpieceortothe
load.OLPisusedtominimizetheextentofthedama ge totheload.Switch offthe
powersupplyassoon
asthiswa rningappears.Toresetthiswa r n ing ,switchofftheunit
andremoveallloadingandthenswitchtheunitonagain.Ifthisproblemper si s ts ,
pleasecontactExtechTechnicalSupport.
A
C.V.
C.C.
A
C.V.
C.C.
382275_382276-en-GB_V4.7 1/17
14
MaintenanceandRepairServices
Cleaningthemeterhousing
Priortocleaningthemeterhousing,disconnectthemainsplugfromthepoweroutlet.Clean
onlywithadamp,softclothandacommerciallyavailablemildhouseholdcleaner.Ensurethat
nowatergetsinsidetheequipmenttopreventpossibleshortsanddamagetotheequipment.
Specifications
RearOutput
Variable OutputVoltage 1to30VDC
Variable OutputCurrent 1to20A
Voltage
Regulation
Load(10to1 00% Load) 50mV
Line(170to264VAC 20mV
Current
Regulation
Load(90to10%Rate dVoltage) 100mA
Line(170to264VACVariation) 50mA
Ripple&Noise(peakpeak)Voltage 50mV
CurrentRipple&Noise(rms) 30mA
FrontOutput
Variable OutputVoltage 1to30VDC
Variable OutputCurrent 1to5A
Voltage
Regulation
Load(10to1 00% Load) 350mV
Line(170to264VAC 20mV
Current
Regulation
Load(90to10%Rate dVoltage) 100mA
Line(170to264VACVariation) 50mA
Ripple&Noise(peakpeak)Voltage 50mV
CurrentRipple&Noise(rms) 30mA
MeterAccuracy
VoltageMeter ±(0.2%+3digits)
CurrentMeter ±(0.2%+3digits)
TrackingOver
Voltage
Protection
1to5V Defau lt Valueis+2V
5to20V Defau lt Valueis+3V
20to30V Defau lt Valueis+4V
382275_382276-en-GB_V4.7 1/17
15
InputVoltage 100to120VAC50/60Hz(Mode l382275)
210to230VAC50/60Hz(Mode l382276)
RatedLoa dInputCurrent 3.1A(Model382276)
5.9A(Model382275)
Fuses 382275‐8A/250Vtimedelay;glass5x20mm
 3822764A/250Vtimedelay;glass5x20mm
Efficiency 87%atoptimalloa d
SwitchingFreque ncy 75to95KHz
Cooling
Method ThermostaticContro lFa nfromZerotofullspeed
Protections Overload,ShortCircuitbyConstantCurrent,Output
TrackingOverVoltage,OverTemperatur e
TransientResponseTime 1.5ms(50100%ofload)
PowerFa ctorControl >0.95atoptimalload
SpecialFeatures Three(3)userdef inedpresetsandRemoteControl
OperatingHumidityRange 10
to80%RH
Altitude 2000meters(7000Feet)
PollutionDegree 2
MainSupplyVoltageFluctuation ±10%ofthenominalvoltage
Dimensio ns(WxHxD) 200x90x215mm(7.9x3.5x8.5“ )
Weight 2.6kg(5.7lbs)
Approvals CEEMC:EN55011,55022 LVD:EN60950,61010
Copyright©20142017FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform.
ISO9001Certified
www.extech.com
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Extech Instruments 382275 User manual

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User manual
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