wtw TriOxmatic 700IN Operating Manual page 30

Maintenance, cleaning, disposal, spare parts
30
3 Remove air bubbles by careful knocking.
4 Rinse the probe head with electrolyte solution.
5 Screw the WP 600 membrane head on the shaft.
Hold the probe inclined. Excess electrolyte solution is
pressed out at the vent.
Vent (upper part)