Xylem MultiLab 4010-2 Manual do Utilizador descarregar pdf (Página 90)

What to do if... MultiLab 4010-2

90 ba76142e01 05/2013

No stable measured

value

Obviously incorrect

measured values

13.2 Dissolved oxygen

Error message,

OFL

Error message,

Error

Cause Remedy

IDS pH sensor:

– Diaphragm contaminated – Clean diaphragm

– Membrane contaminated – Clean membrane

Test sample:

– pH value not stable – Measure with air excluded if

necessary

– Temperature not stable – Adjust temperature if necessary

IDS pH sensor + test sample:

– Conductivity too low – Use suitable IDS pH sensor

– Temperature too high – Use suitable IDS pH sensor

– Organic liquids – Use suitable IDS pH sensor

Cause Remedy

IDS pH sensor:

– IDS pH sensor unsuitable – Use suitable IDS sensor

– Temperature difference between

buffer and test sample too great

– Adjust temperature of buffer or

sample solutions

– Measurement procedure not suit-

able

– Follow special procedure

More information and instructions on cleaning and exchange of

sensors are given in the documentation of your sensor.

Cause Remedy

– Measured value outside the measur-

ing range

– Select a suitable measuring

medium

Cause Remedy

– Sensor contaminated – Clean the sensor

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Xylem MultiLab 4010-2 Manual do Utilizador Página 90