Installation Guide

DO600-en-GB_V7.4 12/16

Calibration

1. Calibrationshouldbeperformedonadailybasis.

2. TurnthemeterON

3. PressandholdtheMODE/HOLDbuttonuntil%isdisplayedontheLCD.

4. Ifthemeterhasnotbeenusedforseven(7)daysorlonger,allowtheelectrodetofully

polarize.Thismaytake2‐3minutes.

5. Placetheelectrodecapontotheelectrode.Thespongecontainedinthecapshouldbeonly

moistened(notsoaked)with(distilledwater)orcleantapwater.Besurethattheelectrode

membraneiscleananddryorthecalibrationwillbeincorrect.Thereneedstobeanairgap

betweenthemembraneandthesponge.Nevertouchthemembrane,asskinoilwillaffect

theelectroderesponse.

6. WaituntilthereadingstabilizesthenpressandholdtheCAL/RECALLbuttonuntilCALis

showninthelowerdisplay.Thereadingswillblink“101.7”and“SA”willappear.

7. Whenthecalibrationiscomplete“End”willappearandthenthemeterwillreturntothe

normalmeasurementmode.Turnoffthemeter.

Note:The“SA”willnotappearifthecalibrationfails.



Optional’zerooxygen’calibration(improvesmeasurementaccuracyforveryloworveryhighDO

measurements):

Placetheelectrodeinazerooxygencalibrationsolution,suchas5%sodiumsulfite,waitfor

stabilityandpresstheCAL/RECALLbuttonuntilCALisshownintheinthelowerdisplay.Stabilityin

azerosolutionmaytakemanyminutes,dependingonelectrodehistory.

Note:SodiumSulfitecanbecomedepositedontheelectrodeandonthe“coined”surfaceofthe

electroderetainingcollar.ThepresenceoftheSodiumSulfitewillnegativelyaffectfutureDO

measurementsuntilsuchatimewhereALLofitisremovedfromtheelectrode.



OptionalElectronicZerocalibration.

IftheDO600isnotmakingstablemeasurementsoryouarereplacingtheelectrodewithanew

assembly,performthisZerocalibration.



Turnoffthemeter,removetheelectrodebyunscrewingtheretainingringandpulloffthe

electrode.

TurnonthemeterandwaitfortheSelfcalibrationtocomplete.



SettheModeto%.

PressandHoldtheCALbutton untilCALappearsonthedisplay.Whenthecalcyclecompletes,the

displayshouldread0.0%.

Turnoffthemeter.

Re‐attachtheelectrode.PerformtheelectrodecapcalibrationfromStep5.