WT.050.560.001.UA.IM.0714
101
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA
W3T140188
c. When the cell block is empty, install the drain plug.
d. Unscrew the electrolyte reservoir clamping nut (2) and remove the
cell cover (3).
e. Withdraw the complete electrode/electrolyte reservoir assembly (4 to
11) from its housing. This can be achieved by exerting a gentle pres-
sure at the top of the electrolyte reservoir. Rinse off the reservoir to
remove any remaining grit particles.
f. Being careful of the cable connector, replace the assembly ensuring
that the keying pin in the base of the cell block locates into its cor-
responding hole in the electrode housing (8).
g. Empty a half capful of grit into the cell block and replace the cover.
The assembly should then be secured in its housing with the clamping
nut.
h. Open the sample water shut-off valve at the inlet to the measuring
cell assembly.
i. Leave the cell running for an hour, to allow the system to settle down,
and then carry out the zero calibration procedure. This procedure may
be repeated after 24 hours if required.
• Electrode and membrane replacement
The membranes, which form the contact point between reference elec-
trode and sample water, cannot be cleaned. With very good water quality,
membrane life may extend for up to three years continuous use. After this
period of time however, they should be replaced. Where the quality of the
sample water is particularly poor, fouling of the membranes may occur
with a corresponding loss in cell efficiency (Refer to the note in “Bimonthly
check,” above, for further details).
With the electrode/electrolyte reservoir assembly withdrawn from the cell
block as described above, the electrodes may be removed and replaced
as follows (see Dwg. 50.560.000.010):
a. Slacken the cable gland locking nut and unscrew the cable gland (11)
taking care to avoid rotating the cable.
b. Unscrew the cover (10) and remove the push-fit connections from
each electrode (and the temperature sensor if fitted).
c. Unscrew the nut (9) which clamps the electrolyte reservoir to the
electrode housing (8) and separate the two items.
Summary of Contents for Wallace & Tiernan Depolox 3 plus
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