DPM TT Series - Mode of Operation; Operational Modes and Features

MODEOFOPERATION
TTSeriesLR Manual
Page03

On/Of
f
:
 PressandholdENABLEthenpressONorOFFasappropriate.
AutoZero:
 Thecyclewillbeginassoonastheinstrumentisswitchedon.Thisisfactoryset ata30
secondintervaluponswitchonandthereafterat60secondintervals.
TochangethistimingseeUserMenupage05.
Theinstr
umentcontainsaminiaturesolenoidvalve,whichisolatesthepressuresensors
duringautozero.Thevalveemitstwoclearlyaudibleclicks,whichsignalthestartandendof
theautozeroprocess.
BatteryLow:
 Thebatteryconditionismonitoredeverytimetheinstrumentautozeroes.
Whenthe‘batterylow’war
ningappears,thebatterymustbereplaced immediately,
otherwisethereadingsobtainedwillbeunreliable.
Ifatanytimethereadingsseemsuspect,checktheconditionofthebatterybyzeroingthe
instrumentmanuallyusingZERO.
Ifindoubtreplacethebattery.Forrechargeableinstrumentschargetheinternalbattery
withthechargers
upplied.
Units:
 Theunitofmeasurementisshownontherighthandsideofthedisplay.
Beinganautoranginginstrument,thecorrectresolutionandthedecimalpointwillbe
displayedaccordingtothepressurebeingapplied.
FASTSLOW:
 Somepressurisedcircuitsexhibitpressureandvelocityfluctuations,whichcanbe
disconce
rting;ifunacceptablefluctuationsoccur,pressFASTSLOWandverifythattheslow
indicationisdisplayedonthescreen.
Store:
 Showsthenumberofreadingsstoredontheinstrument.
TostoredatamanuallypressSTOREwhiletheinstrumentisinSlow1,Slow2,Slow3orSlow4
mode:thereadi
ngonthedisplaywillbeloggedandthecounterwillincreasebyone.
Duringdataloggingthecounterwillincreasebyoneeverytimetheinstrumentrecordsa
value.ForinformationondataloggingseeOptionMenupages08and09.
AudibleFeedback:
 Whiletheinstrumentison,audiblefeedbackcanbehe
ardeverytimeakeyispressed.
SignalIn/Reference:
 Pressureports.Theinstrumentrespondstopositive,negativeanddifferentialpressure.
RS232Port:
 Islocatedbetweenthetwoports.
