Calibrating The Sensor; Troubleshooting And Rectification Work - Mettler Toledo InPro 6050 Serie Bedienungsanleitung

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6.4

Calibrating the sensor

• For an air calibration, the sensor must be remo-
ved from the medium, gently cleaned and dried.
Water droplets on the membrane must be remo-
ved, as they prevent the sensor from being cor-
rectly calibrated.
• To calibrate in water or sample medium, you
must know the exact oxygen concentration and
ensure that equilibrium between the air and the
medium is reached (this may take quite a long
time).
Make sure that all other parameters (temperature
and pressure) are constant during the calibration.
Please note also that a minimum flow rate is
necessary.
• For detailed calibration instructions, please refer
to the transmitter instruction manual.
• In case of an error message from the transmitter
after a calibration, clean the sensor, change the
electrolyte and replace the membrane if this is
damaged.
6.5

Troubleshooting and rectification work

On a regular basis, you can take the sensor out of the
water, clean and dry it. If it gives a reading of 100%
saturation, the sensor does not need to be recalibrated.
If the sensor gives too high or too low values, it
should be recalibrated.
After a long storage time (more than 6 months) or
after a certain period of time in operation (typical-
ly one year for water applications), the electrolyte
should be replaced. Replace damaged membranes
as necessary.
If after a calibration the sensor still gives too high or
too low values, you should change the electrolyte
and the membrane.
InPro 6050
52 200 251 D
InPro 6050 Series O
© 03 / 2023 METTLER TOLEDO
Printed in Switzerland
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