Maintenance; Cleaning The Measuring Instrument; Cleaning The Sensor - Endress+Hauser CPM280 Manuel

CPM280
!
Note!
Always perform a reset after replacing the batteries.
13

Maintenance

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Caution!
Prior to commencing maintenance work:
Disconnect the sensor connector from the instrument.

13.1 Cleaning the measuring instrument

Clean the front of the housing with usual commercial cleaning agents.
The front is resistant to the following in accordance with DIN 42 115:
• Alcohol (short-term)
• Diluted acids (max. 2% HCl)
• Diluted alkalis (max. 3% NaOH)
• Soap-based household cleaner
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Caution!
Never use the following for cleaning purposes:
• Concentrated mineral acids or alkalis
• Benzyl alcohol
• Methylene chloride
• High-pressure steam

13.2 Cleaning the sensor

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Warning!
When using the following cleaning agents, make sure you protect your hands, eyes and clothing!
pH sensor:
• Oily and greasy deposits:
Clean with detergent (grease remover, e.g. alcohol, acetone, dishwashing detergent if appli-
cable).
• Lime and metal hydroxide deposits:
Dissolve deposits with diluted hydrochloric acid (3 %) and then rinse with plenty of clear wa-
ter.
• Light biological deposits:
Pressurized water
ORP sensor:
Mechanically clean metal pins or surfaces carefully.
Endress+Hauser
Maintenance
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