Extech Instruments HD780 User manual

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USERMANUAL
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HeavyDutyManifoldPressureGauge
ModelHD780
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AdditionalUserManualTranslationsavailableatwww.extech.com

2HD780‐en‐GB_V1.09/16
Introduction
CongratulationsonyourpurchaseoftheExtechInstrumentsHeavyDutyManifoldandPressure
GaugeModelHD780.Thisdeviceisaportable,digitalrefrigerantmanifoldmeterthatmeasures
highpressure,TypeKtemperatureandambienttemperature.Thismeterisshippedfullytested
andcalibratedand,withproperuse,willprovideyearsofreliableservice.Pleasevisitour
website(www.extech.com)tocheckforthelatestversionofthisUserManual,Translations,
ProductUpdates,CustomerSupport,andProductRegistration.
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Features
Measurespsi,kPA,inHg,cmHg,bar,plusTypeKandambienttemperature
AutomaticTemperatureCompensation
Autopowerofffeaturesavesbatterylife
Easy‐to‐readLCDwithbacklight
DataholdandMIN‐MAXreadings
Includestwoheavydutypressurehoses,protectiverubberholster,twoTypeKtemperature
clampprobes,twogeneralpurposeTypeKbeadwiretemperatureprobes,UniversalAC
adaptorwithplugs(US,EU,UK,AUS),9Vbattery,andhardcase.
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3HD780‐en‐GB_V1.09/16
MeterDescription
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1. ProbeConnection
2. LCDDisplay
3. /SETButton
4. /UNITSButton
5. ENTERButton
6. °F/°C/Button
7. P(P1,P2selection)M(mode)Button
8. MAX/MINButton
9. H(Hold)Button
10. T(T1,T2selection)/M(mode)Button
11. POWERButton
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RIGHTSIDEVIEW
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1. T2Input
2. DC9VPowerAdapterInputSocket
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1
2
3
4
5
6
7
89
10
11
1
2

4HD780‐en‐GB_V1.09/16
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LEFTSIDEVIEW
1. T1Input
2. AmbientTemperaturesensor
3. Batterycompartment(Back)
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DISPLAY
1. P1,P2andP1‐P2Pressure
2. Pressureunits
3. T1,T2,T1‐T2Temperature
4. Holdicon
5. Setupicon
6. MAX/MIN/AVGindicators
7. AmbientTemperature
8. Autopoweroffsymbol
9. Poweradapterindicator
10. LowBatteryIndicator
11. Offset
1
3
2
4
5
6
7
8
9
10
11
1
2
3

5HD780‐en‐GB_V1.09/16
Operation
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ButtonDescriptions
PowerON/OFFthemeter
MAX/MINSelectMAX/MIN/AVG
PM TogglebetweenP1andP2
H Freezethereadingsonthedisplay
TMTogglebetweenT1andT2(Themiddledisplayshowsthetemperatureplusthe
offset.SeetheSETUPsectiontoadjusttheoffsetvaluesforT1andT2)
/SET PressoncetopowerON/OFFbacklightorpressfor3secondstoenter/exit
setupmode
/UNITSChangethepressureunits,scrollthoughsetupoptions,orincreasethe
displayedsetting
°F/°CChangethetemperatureunits,scrollthroughsetupoptions,ordecreasethe
displayedsetting
Pressonetimetoentersetupoption.Presstwotimestostorethedisplayed
settingintomemory
DisplayBacklight
ToturnthedisplaybacklightON,momentarilypressthebacklight  button.Toturnthe
backlightoffpressthebacklightbuttononemoretime.
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DataHold
TofreezeadisplayedreadingontheLCD,presstheHOLDbuttononetime(theHOLDiconwill
appearonthebottomleftportionoftheLCD).ToexitHOLD,presstheHOLDbuttonagain.
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UnitsofMeasure
Thecurrentlyselectedunitofmeasureisshownbelowthemeasurementvalueonthetop
sectionsofthemeter’sLCD.Tochangetheunitofmeasure,pressthe/UNITSbuttonuntilthe
desiredunitofmeasureappears.
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DisplayingPressure
PressUnitbuttontoscrollthroughavailablepressureunitsofmeasure.PressPMbuttonto
togglebetweenP1,P2,P1‐P2readings.
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DisplayingTemperature
PressunitbuttontoselectC/F.PressTMbuttontotogglebetweenT1,T2,T1‐T2readings.The
displayshowsdashes(‐‐‐)whenthereisnothermocoupleconnected.Thedisplayshows“OL”
whenthetemperaturebeingmeasuredisoutsidethethermocouplerange.

6HD780‐en‐GB_V1.09/16
ViewingMAX‐MIN‐AVG
Foragivenmeasurementsession,thismetercanrecordthehighest(MAX)andthelowest(MIN)
readingsforlaterrecall.
1. PresstheMAX‐MINbuttontoviewthecurrentMAXreadings(MAXiconappears).The
readingsonthedisplayarenowthehighestreadingslogged.
2. PresstheMAX‐MINbuttonagaintoviewthecurrentMINreadings(MINiconappears).The
readingsonthedisplayarenowthelowestreadingslogged.
3. PressMAX‐MINbuttononcemoretoviewthecurrentAVGreadings(AVGiconappears).
Thereadingsonthedisplayarenowthelowestreadingslogged.
ToexittheMAX‐MINmode,pressandholdtheMAX‐MINbuttonfor3seconds.TheMAX‐MIN‐
AVGiconswillswitchoffandthemeterwillreturntothenormaloperatingmode.
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ZeroAdjust(Pressure)
TheunitmustbekeptintheuprightpositionwhenZEROINGorwhentakingmeasurements.To
ZEROthemeter:Beforeuseandwithoutfittingsattachedtothemeter,pressandholdtheH
buttonfor3secondsoruntilthedisplayshowsallzeroes.
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SetupMode
Pressandholdthe/SETbuttonforthreesecondstoentertheSetupMode.Momentarily
pressingtheorbuttonswillcyclethroughoutthefunctions.Press toselectthedesired
function.SetupisdisabledinMIN/MAXmode.Theyare(inorder):
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OFFSET………StoreoffsetsforT1andT2
SLP……Sleepmode
Note:PressandholdtheSETbuttonforthreesecondswhenintheSetModetoexit.
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Offset
Usetheoffsetoptiontocompensateforaspecificthermocoupletemperatureerroror
mismatch.Theallowableadjustmentrangeis±5.0°C(9.0°F).
1. PlugthethermocoupleintotheT1orT2inputconnectorlocatedoneithersideofthemeter.
2. Placethethermocoupleinaknown,stableenvironment.
3. Allowthereadingstostabilize.Theprimarydisplayshowsthetemperature,whilethe
bottomdisplayshowstheoffsetvalue.
4. Usethe▲and▼buttonstoadjusttheoffsetuntiltheprimaryreadingmatchesthe
calibrationtemperature.Pressbuttontostorethevalueandmovetothenextsetup
modeoption.
SleepMode(AutoPowerOFF)
Withsleepmodeactive,themeterautomaticallypowersoffafter20minutesofinactivity.To
defeatthisfeature,whileinSLPmode,presstoindicateON(sleepmodeON)orOFF(sleep
modeOFF).Pressorbuttonstomakeaselection.Press  tostorethenewsettingin
memory.

7HD780‐en‐GB_V1.09/16
BatteryReplacement
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WARNING:Toavoidelectricalshock,removethetestleads,disconnectthemeterfrom
anycircuitandturnOFFthemeterbeforeopeningthecase.Donotoperatewithanopencase.
BatteryReplacement
Whenthelowbatteryicon  appearsontheLCD,thebatteriesmustbereplaced.Several
hoursofaccuratereadingsarestillpossibleinthiscondition;however,batteriesshouldbe
replacedassoonaspossible:
Removethecoverfromtherearofthemeter.
Replacetheone(1)9Vbatteryobservingpolarity.
Replacethebatterycompartmentcover.
Note:ThemetercanalsobepoweredbyaDC9VPowerAdapter.Themeterwillbepermanently
poweredONwhentheDCadapterisusedasthepowersupply(thepowerbuttonfunctionis
disabled).
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Safety:Pleasedisposeofbatteriesresponsibly;neverdisposeofbatteriesinafire,batteriesmay
explodeorleak.Ifthemeterisnottobeusedfor60daysormore,removethebatteryandstore
separately.
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Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewherethebatterieswerepurchased,orwherever
batteriesaresold.
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Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuserisobligated
totakeend‐of‐lifedevicestoadesignatedcollectionpointforthedisposalof
electricalandelectronicequipment.


8HD780‐en‐GB_V1.09/16
Specifications
FunctionRangeResolutionAccuracy
Pressure‐14to0psi0.1(0.3psi)
0to200psi0.1(1.0psi)
200to400psi0.1(0.3%+1psi)
400to500psi0.1(0.3%+1.5psi)
‐96to0kPa1(2kPa)
‐0to1378kPa1(7kPa)
1378to2757kPa1(0.3%+7kPa)
2757to3447kPa1(0.3%+10kPa)
‐0.96to0bar0.01(0.02bar)
0to13.79bar0.01(0.1bar)
13.79to34.47bar0.01(0.3%+0.1bar)
‐28to0inHg0.1(0.4inHg)
0to407inHg0.1(2inHg)
407to814inHg0.1(0.3%+2inHg)
814to999.90.1(0.3%+3inHg)
‐72to0cmHg1(1cmHg)
0to1034cmHg1(5cmHg)
1034to2068cmHg1(0.3%+6cmHg)
2068to2585cmHg1(0.3%+8cmHg)
TypeKthermocouple
(T1/T2Temperature)
‐60°Cto537.0°C
(‐76°Fto999.9°F)
0.1(0.15%rdg+1.0°C)
(0.15%rdg+1.8°F)
AmbientTemperature
(SensorType:NTC)
0°Cto50.0°C
(32.0°Fto122.0°F)
0.1
1.0°C(2.0°F)
GeneralSpecifications
PressureConnectorTypeStandard¼NPTmaleflarefitting
StatedAccuracy@25°C(77oF)<75%RH
Max.OverloadPressure800psi
DataHoldFreezesdisplayedreading
AutoPowerOFFAfterapprox.30minutesofinactivity(canbedeactivated)
Storageconditions‐20to60oC(‐4to140oF);<80%RH(withbatteryremoved)
Operatingconditions0to50oC(32to122oF);<75%RH
Batterypower9Vbattery(Lowbatteryindicator)
Dimensions23.5x7.6x5cm (9.3x3.0x2.0“)
Weight460g(16.2oz.)
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