9. MAINTENANCE AND
TROUBLESHOOTING
9.1. Safety instructions
DANGER
Risk of injury due to electrical voltage.
▶ Observe all applicable accident protection and safety regula-
tions for electrical equipment.
Risk of injury due to high pressure in the installation.
▶ Stop the circulation of fluid, cut off the pressure and drain the
pipe before loosening the process connections.
Risk of injury due to the nature of the fluid.
▶ Respect the regulations on accident prevention and safety relat-
ing to the use of aggressive fluids.
DANGER
Risk of injury due to the nature of the electrolyte.
▶ Observe the warnings on the electrolyte bottle.
▶ Wear gloves whose material is compatible with the electrolyte
used to manipulate the sensor and the electrolyte.
▶ Do not swallow the electrolyte.
▶ Avoid contact of the electrolyte with skin and eyes. In case
of any contact with the electrolyte, wash with a lot of running
water. If there is an eye inflammation, contact a doctor.
9.2. Regular maintenance operations
• Do not remove the brown or grey coating of the elec-
trodes because the electrodes would be damaged.
• Do not unscrew the membrane holder in stainless steel
1.4571 from the membrane cap because the membrane
would be damaged.
→ Regularly make sure the sensor presents no dirt, algae and
bubbles depending on the process: if the membrane is blocked,
change the membrane cap.
→ Once a week, make sure the measuring signal is correct. See
chap. 9.3.4.
23
Maintenance and troubleshooting
Type 8232
english
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