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DO600-en-GB_V7.4 12/16
11
Appendices
TroubleshootingGuide
Symptom PossibleCauses Action
Unitwillnotpoweron‐Batteriesnotinplace
‐Deadbatteries
‐Batterypolarityincorrect
‐ReplaceBatteries
‐ReplaceBatteries
‐Reorient/Replace
Batteries
“BAT”indicatorshownon
display
‐Batteriesareweak‐ReplaceBatteries
UnstableReadings‐Insufficientelectrolytein
probe(Airbubblespresent
whenprobeisinverted.)
‐Electrolyteisdepleted
‐Replaceelectrolyte,and
membranecapassembly.
Readingsdriftdown‐Insufficientstirring(the
probeconsumesoxygenat
themeasuringsurface,
requiringconstantsample
movementacross
membrane)
‐Moveprobeinsampleor
stirsample
SlowResponse‐Dirtyordamaged
membrane
‐Replaceelectrolyteand
membranecap
Electrodecannotbe
calibrated
‐Depletedelectrolyte
‐Dirtyordamaged
membrane
‐Replaceelectrolyteand
membranecap
Electrodecannotbe
calibratedafterreplacing
theelectrolyteand
membranecap
‐Dirtyprobe(Cathodeisnot
ashinygoldcolor)
‐Cleancathodewith
Polishingpaper*perform
theelectronincZero
calibration
Samplereadingisfrozen‐Unitisin“HOLD”mode
‐Unitislocked
‐ReleaseHOLD
(momentarillypress
Mode/Holdbutton)
‐Removebatteries,press
ON/OFFbutton,replace
batteriesandrestart
*PolishingpaperisavailableintheDO603membranekit
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