Endress+Hauser Oxygen Sensor COS22D

The measurement can be corrupted by sensor fouling or malfunction due to the following, for example:

Deposit buildup on the sensor membrane

This results in a longer response time and, under certain circumstances, a reduced slope.

For reliable measurement, the sensor must be cleaned at regular intervals. The frequency and intensity of the cleaning operation depend on the medium.

• At regular intervals during operation as necessary

• Before returning it for repairs

Sensor disconnected from the transmitter and removed from the medium

Membrane body removed using the provided tool

Old membrane body and electrolyte disposed

New membrane body taken out of its packaging

Topping up the electrolyte and installing the membrane body

Fresh electrolyte poured into the membrane body

Warning: Use only original sealing rings for replacement

Is the sealing ring visibly damaged?

Select the O-ring to be replaced

Was the replacement successful?

Is the sealing ring on the membrane body damaged?

If the sealing ring on the membrane body is damaged, replace the entire membrane body.

Sign off on the sealing rings replacement

Warning: Handle the sensor with care during removal and cleaning

Sensor successfully removed from the medium

Sensor membrane cleaned and dried

Enter the oxygen saturation index measured after 10 minutes

Measured value is at 100 ± 2 % SAT

Sign off on the sensor measurement function check

The standard electrolyte is a strong irritant

Danger of severe skin and eye irritation!

‣ Be absolutely certain to observe the corresponding workplace safety regulations.

‣ Wear protective gloves and goggles when handling the electrolyte.

‣ In case of eye contact: Remove contact lenses, rinse eyes with water for a few minutes and contact a doctor.

‣ In case of skin contact: Take off wet clothing immediately, wash the skin or take a shower.

Generally, the following applies:

• The electrolyte must be changed if the membrane body is detached.