Hach-Lange 3798-S sc - Manual (Page 21)

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Section 6 Maintenance
6.1 Maintenance schedule
The following table reflects experience and may, depending on the sector and
application, vary significantly from actual requirements.
You can set the calibration interval in the sensor setup. The controller then
reminds you when calibration is due.
6.2 Cleaning the sensor
Clean the sensor with a jet of water. If there is still soiling present, use a soft,
damp cloth.
Maintenance task 90 days annual
Clean sensor x
Check sensor for damage x
Calibration (if necessary)
If necessary as per
agreement with the
authorities