Hach 8398 Série Manuel D'utilisation page 6

Figure 2 Mounting examples
1 Sanitary (CIP) flange mount
2 Union T-mount
Section 4 Maintenance
Multiple hazards. Only qualified personnel should conduct the tasks described in this section of the manual.
4.1 Controller
Refer to the Maintenance section of the controller documentation.
4.2 Clean the sensor
Chemical hazard. Always wear personal safety protection in accordance with the Material Safety Data Sheet for
the chemical that is used.
Personal injury hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce the process
pressure to below 10 psi before removal. If this is not possible, use extreme caution. Refer to the documentation
supplied with the mounting hardware for more information.
Pre-requisite: Prepare a mild soap solution with a non-abrasive dishwashing detergent that does not
contain lanolin. Lanolin leaves a film on the electrode surface that can degrade the sensor
performance.
Examine the sensor periodically for debris and deposits. Clean the sensor when there is a buildup of
deposits or when performance has degraded.
1. Use a clean, soft cloth to remove loose debris from the end of the sensor. Rinse the sensor with
clean, warm water.
2. Soak the sensor for 2 to 3 minutes in a soap solution.
3. Use a soft bristle brush to scrub the entire measuring end of the sensor.
4. If debris remains, soak the measuring end of the sensor in a dilute acid solution such as < 5%
HCl for a maximum of 5 minutes.
6 English
3 End of pipe immersion
4 Ball valve insertion
D A N G E R
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