Instruction manual

8. Maintenance
8-16
RF-20A/20Axs
• For the RF-20A:
Using an implement with a fine point, such as a
toothpick, remove the O-ring from the cell housing
while taking care not to damage the emission lens,
then remove the emission lens and spacer.
Fig. 8.20
Fig. 8.21
RF-20A
9
Loosen the two screws on the rear face of the cell
housing alternately by equal amounts, and
remove the rear plate.
10
Remove the spacer, cell and cell gasket from the
cell housing.
NOTE
• Take care not to soil or damage the cell or cell gasket.
This could cause reduced sensitivity or liquid leakage.
Fig. 8.22• Remove the components with plastic forceps or a
similar tool.
O-ring
Cell housing
O-ring
Emission lens
Spacer
Cell housing
Cell housing
Screws
Rear plate
Spacer
Cell
Cell gasket