Evoqua WALLACE & TIERNAN MFC, Инструкция по эксплуатации, Страница: 205 / 268

MFC
Maintenance
7.
205
7.2 Maintaining DEPOLOX
®
5 flow block assembly
Replacing cell sand in
DEPOLOX
®
5 three-electrode
cell
The cell sand required for constant cleaning of the electrodes
grinds itself down over time until it is very fine. It must therefore be
replaced regularly. Cell sand is delivered in a plastic bottle:
1 Remove DEPOLOX
®
5 flow block assembly cover.
2 Close the ball valve on the sample water inlet and on the outlet
(pressurised version).
3 Open the drain valve and drain the cell body (hold container
underneath).
4 Close the drain valve when the cell body is empty.
5 Remove the sensors. Loosen the cable union (hold the cable
while doing this as it may not be allowed to rotate).
6 Loosen the lower cap on the 3 electrode cell.
7 Remove the signal cable.
8 Unscrew the upper knurled nut on the electrolyte container.
9 Remove the electrolyte tank out of the cell body from below
using the electrode mount.
10 Wash the cell sand out of the electrode mount.
11 Insert the electrode mount back into the cell body using the
electrolyte container.
Please note
The cell body's dowl pin must be locked into place in the
appropriate hole in the electrode mount.
12 Screw the upper knurled nut back onto the electrolyte
container.
13 Reconnect the signal cable acc. to colour.
14 Screw the cap back on.
15 Fill half a cap from the plastic bottle with cell sand and pour it
into the cell body (approx. 1/2 cm³ cell sand) (see 6.3.2 “Filling
the cell sand (DEPOLOX® 5 only)" on page 182).
16 Reinsert electrodes.
CNT Counter electrode Blue point Blue cable
WRK Working electrode Red point Pink cable
Ref Reference electrode (middle) White cable