Xylem MultiLab 4010-2 Manual do Utilizador descarregar pdf (Página 89)

MultiLab 4010-2 What to do if...

ba76142e01 05/2013 89

13 What to do if...

13.1 pH

Error message

OFL, UFL

Error message,

Error

More information and instructions on cleaning and exchange of

sensors are given in the documentation of your sensor.

Cause Remedy

IDS pH sensor:

– Measured value outside the measur-

ing range

– Use suitable IDS pH sensor

– Air bubble in front of the diaphragm – Remove air bubble

– Air in the diaphragm – Extract air or moisten junction

– Cable broken – Exchange IDS pH sensor

– Gel electrolyte dried out – Exchange IDS pH sensor

Cause Remedy

IDS pH sensor:

– The values determined for zero point

and slope of the IDS pH sensor are

outside the allowed limits.

– Recalibrate

– Diaphragm contaminated – Clean diaphragm

– IDS pH sensor broken – Exchange IDS pH sensor

Buffer solutions:

– The used buffer solutions do not

agree with the set buffer set

– Set different buffer set

– Use different buffer solutions

– Buffer solutions too old – Use only once.

Note the shelf life

– Buffer solutions depleted – Change solutions

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Xylem MultiLab 4010-2 Manual do Utilizador Página 89