S I G N A T U R E
37
PROBLEM SOLUTION
Impossible calibration of the pH/ORP sensor
Contaminated or expired calibration solution.
Blocked sensor membrane. Check the
membrane is not damaged. Clean the sensor
with diluted acid in water, shaking it lightly.
Sensor fault. Replace the sensor.
Slow response of the pH/ORP sensor
Sensor electrostatically charged. During the
calibration phase, the sensors should not be
dried with paper or cloth. Clean it exclusively
with water and shake it lightly.
Insufcient renovation of the analyzed water
(no ow through the sample point). Ensure
that the tip of the sensor is submerged in
the water at the sample point, and that no air
bubbles are present.
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