18
Cleaning the Resistivity Cell
1.
Disconnect the unit from the power supply.
2.
Remove the power cord from the power entry module.
3.
Remove the reservoir cap and the screws securing
the EASYpure RF’s cover.
4.
Remove the cover by lifting it straight up. Remove the
filter and Luer fitting. Remove the front cover.
5.
Remove the screw holding the cell-cable retaining clip.
6.
Disconnect the cell lead from the printed circuit board
and gently pull the cable out of the EASYpure RF’s
frame.
7.
Unscrew and remove the cell.
8.
Carefully remove the O-ring before cleaning the cell.
Remove the cell bushing.
9.
Wash the cell in a mild detergent solution or a 10%
Hydrochloric or Sulfuric acid solution (follow acid man-
ufacturers recommended handling procedure). This
may be done in an ultrasonic cleaner or with a soft
brush.
10. Thoroughly rinse the cell in deionized or distilled water
following the detergent or acid cleaning.
11. After cleaning, reinstall and check the o-ring on cell;
replace if necessary.
12. Reinstall the cell into the cell well and hand tighten.
Reroute the cable up through the housing and recon-
nect. Refer to Figure 6 for proper position.
CAUTION
The cell electrodes are etched to improve wet-
ting characteristics. Do not mechanically abrade
or damage this surface (i.e. do not clean with a
wire brush, sandpaper, etc.).
CAUTION
Do not immerse the entire cell assembly in
cleaning solution, only the electrode portion.
M
AINTENANCE AND
S
ERVICING
Figure 6 Printed Circuit Board
Pins for Resistivity
Cell on back
Pins for
Membrane Switch Lead
Receptacle for
PCB Relay plug
Nuts
