Extech Instruments HD755 User Manual

HD755-EU-EN V1.7 7/13
4
BasicOperation
MeterPower
TheHD755usesa9Vbatteryforpower.IfthemeterdoesnotswitchonwhenthePOWER
buttonispressedorifthedisplayshowsBAT,replacethebattery. 
WhenthePOWERbuttonsispressed,themeterperformsashortself‐testandrevertstothe
settingsinplace
whenthemeterwaslastturnedoff.
AutomaticPower‐offFeature
Inordertoconservebatterylife,themeterhasanautomaticpowerofffeature(after20
minutes).Todefeatthisfeature,pressandholdtheHOLDbuttonwhileturningthemeteron.
ReleasetheHOLDbuttonwhen‘n’appearsonthedisplay.Themeterwillnowremainonuntil
theuserturnsitofforuntilthebatteryweakens.NotethattheAutoPowerOFFfeaturewillbe
reactivatedthenexttimethemeteristurnedoffandthenon.
UnitofMeasure
PresstheUNITbuttontoselecttheunitofmeasure.Thismeterofferseleven(11)unitsof
measureaslistedbelow.

UnitofMeasure Displayicon
Poundspersquareinch psi
InchesofMercury inHg
Milli‐bar mbar
MillimetersofMercury mmHg
Kilo‐Pascals kPa
Kilogramspercentimetersquared Kgcm
2

Inchesofwater inH
2
O
Feetofwater ftH
2
O
Centimetersofwater cmH
2
O
Bars Bar
Ouncespersquareinch ozin
2


FittingsConnection
ConnecttubingtotheP1,P2(orboth)inputport(s).Ifbothinputsareused(differentialmode),
themeterdisplaysapositivepressurereadingiftheP1pressureisgreaterthanP2anda
negativereadingifP2isgreaterthanP1.
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Extech Instruments HD755 Specifications

General

Brand	Extech Instruments
Model	HD755
Category	Measuring Instruments
Language	English