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Troubleshooting
a) The output value from the sensor is higher than the value detected
with DPD:
The porous membrane is damaged
•
Agents water pollutants interfere with the measurement
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Wiring damaged
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pH of the water is lower than 6
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b) The output value from the sensor is lower than the value detected
with DPD:
Are there any deposits on the porous membrane
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The working flow is too low
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There are air bubbles on the porous membrane
•
The presence of surfactants in water
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pH of the water is higher than 8
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There is more electrolyte inside the membrane cap
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The gold electrode is oxidized
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c) The output value from the sensor is 4mA (0ppm)
In water is present only combined chlorine
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Content of free chlorine to below the limit of detection
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The sensor is not properly connected
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The sensor is faulty
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d) The output value from the sensor is unstable
There are air bubbles on the membrane
•
The porous membrane is damaged
•
The problem does not depend on the sensor
•
0000137887
Rev. 1.0
5
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