WT.050.560.001.UA.IM.0714
100
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA
W3T140188
• Monthly checks
Remove and clean, if fitted, the detachable element of the strainer in the
sample water supply line. Check the calibration of the cell (refer to para-
graph 3.2.1, Free Chlorine (Bare Electrode) Calibration)
• Bimonthly checks (see Dwg. 50.560.000.010)
a. Check the zero point to ensure no drift has occurred.
b. Check that the potassium chloride electrolyte is level with the bottom
of the electrolyte reservoir neck and top up if necessary. This operation
can be carried out by removing the plug (4) in the top of the electrolyte
reservoir and filling with a syringe.
c. The particles of grit used for continuous electrode cleaning take ap-
proximately two months to wear down. After this period of time the
grit should be replaced. The procedure for grit replacement is detailed
later.
d. The membranes in the electrode case (6) form an interface between
the reference electrolyte and the sample water. If the quality of the
water passing through the cell is poor, especially if the water has a
high iron content, inspect the two porous membranes (6) located in
the electrode case. They should be white in color and any obvious
discoloration is a sign that the membranes are becoming clogged up
and should be replaced.
• Semi-annual checks
Every six months the reference electrolyte should be replaced. Electrolyte
replacement can be incorporated into a grit replacement operation. Hav-
ing removed the reservoir (see steps a through f in the procedure on Grit
Replacement that follows), the electrolyte should be discarded safely and
the reservoir thoroughly washed in distilled water. Check the condition of
the porous membranes and replace if needed. Refill the reservoir to the
neck with fresh electrolyte and continue from step g in the Grit Replace-
ment procedure.
• Grit Replacement (See Dwg. 50.560.000.010)
When they become worn, grit particles should be replaced by taking the
following steps:
a. Close the shut-off valve at the cell inlet.
b. Drain the cell by unscrewing the drain plug.
Summary of Contents for Wallace & Tiernan Depolox 3 plus
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