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10
Nederlands
11.0 Problemen en oplossingen
Probleem Reden Verhelping
pH-meting
onnauwkeurig
Vervuilde pH-probe
/ glasgedeelte niet
schoon.
De pH-probe reinigen (zie vak 6.0) en
dan kalibreren.
Hoesje vervuild, verstopt
of droog.
Bevochtig de probe gedurende 24 uur
in KCl-bewaarvloeistof, zie vak 7.0.
Geen eiwitten of oliën meten met dit
toestel. Toestel vervangen.
pH-kalibratie verkeerd.
Controleer of de kalibratie-
oplossingen nauwkeurig zijn.
Vervang ze in geval van twijfel.
Wacht langer totdat de metingen
gestabiliseerd zijn alvorens op een
constante waarde te kalibreren.
pH-kalibratie
onbetrouwbaar.
Kalibreer de pH-probe (zie vak 3.0).
pH-probe beschadigd
of oud.
Vervang de pH-probe.
pH-meting verandert
niet van oplossing
tot oplossing
Gebroken glazen bol,
buis of connector.
Controleer de pH-probe op schade.
Vervang de pH-probe.
Indicatie
batterijniveau
laag
Batterijspanning te
laag voor betrouwbare
meting.
Vervang de batterijen.
GEEN oplaadbare batterijen
gebruiken.
Geen weergave
Batterijen leeg of
verkeerd geplaatst.
Controleer of batterijen correct
geplaatst zijn. Vervang ze indien
nodig.
Op het display
verschijnt ‘Err’
Probleem met pH-
kalibratie.
Zie beschrijving van foutmeldingen
in vak 9.0 van dit document.
Or
Ur
wanneer in pH-
modus
pH boven meetbereik.
pH onder meetbereik.
Oplossing > 14.0 pH.
Oplossing < 0.0 pH.
Controleer de aansluiting van de
pH-probe.
De pH-probe kan defect zijn.
De pH-meter kan binnenin nat zijn.
10


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