Extech Instruments HD755 User Manual

HD755-EU-EN V1.7 7/13
5
ZeroAdjustandOffsetfunction
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HOLD
buttonfor3secondsoruntilthedisplayshowsallzeroes.

ToOFFSETmeterreadings:Pressthe
DIFbuttonwhiletakingameasurement.Subsequent
readingswillrepresentthedifferencebetweenthecurrentmeasurementandthemeasurement
thatwasonthedisplaywhentheDIFbuttonwaspressed..PresstheDIFbuttonagaintoexitthe
OFFSETfunction.
MIN‐MAX‐AVGRecordModewithElapsedTimer
TheRECORDfunctiontracksthemaximum(MAX),minimum(MIN),andaverage(AVG)readings
withatimestamp.Theelapsedtimerisdisplayedonthelowerright‐handcorneroftheLCDand
informstheuserofthetimeaMAXorMINreadingwasrecorded.
1. PresstheRECORDbuttononce.
TheRECindicatorwillappearonthedisplayandthe
displayedelapsedtimerwillstart(HH:MM:SSformat[hours:minutes:seconds]).
2. PresstheRECORDbuttonagaintoviewthehighest(MAX)readingrecordedsincethe
RECORDbuttonwasfirstpressed.TheMAXindicatorandmaximumreadingwillappearon
thedisplay.The
elapsedtimerwillshowthetimeoftheMAXevent.
3. PresstheRECORDbuttonagain,theMINindicatorandtheminimumvaluewillappearon
thedisplay.TheelapsedtimerwillshowthetimeoftheMINevent.
4. PresstheRECORDbuttonagain,theAVGindicatorandtheaverage
valuewillappearonthe
display.Theelapsedtimerwillcontinuetorun.
5. Toreturntonormaloperation,pressandhold
theRECORDbuttonuntilthedisplay
indicatorsREC,MAX,etc.switchoff.
NotethatintheRECORDmode,thebacklightandthepowerbuttonsaretheonlyavailable
functions.
USBPCInterface
Themeterhasabuilt‐inUSBportforusewiththeManometerDataAcquisitionsoftware.The
softwareallowstheusertoview,save,export,andprintreadingsfromtheHD755.Refertothe
documentationincludedwiththesoftwareforcompletedetails.
DisplayedErrorCodes
Thefollowingcodesaredisplayedwhenthemeterencountersanerror.
ERR1:Pressureinputexceedsspecifiedlimits
ERR2:Pressureinputistoolowtoread
ERR3:TheDifferentialPressureinputexceedsspecifiedlimits
ERR4:TheDifferentialPressureinputistoolowtoread

Extech Instruments HD755 Specifications

General

Brand	Extech Instruments
Model	HD755
Category	Measuring Instruments
Language	English