EVOQUA WALLACE & TIERNAN P7 ADVANCED Mode D'emploi page 43

Methods
Add the water sample to the 10 ml mark. Close the vial tightly with
the cap and swirl gently several times until the tablet is dissolved.
Place the vial in the sample chamber making sure that the
are aligned.
Wait for a reaction period of 2 minutes.
! Zero
Test (Countdown can be activated, see page 37)
CL The method symbol flashes for approx. 3 seconds.
RESULT
The display shows value C.
Calculations:
Chlorine dioxide (mg/l)
free Chlorine (mg/l)
combined Chlorine (mg/l)
total Chlorine (mg/l)
e) Chlorine with Ozone
Fill a clean vial (24 mm Ø) with 10 ml of the water sample and
0.0.0
perform zero calibration (see "Operation").
Remove the vial from the sample chamber and empty it, leaving a few
drops remaining in the vial.
Add one DPD No. 1 tablet and one DPD No. 3 tablet straight from
the foil and crush the tablets using a clean stirring rod.
Add the water sample to the 10 ml mark. Close the vial tightly with
the cap and swirl gently several times until the tablets are dissolved.
Place the vial in the sample chamber making sure that the
are aligned.
Wait for a reaction period of 2 minutes.
! Zero
Test (Countdown can be activated, see page 37)
The method symbol flashes for approx. 3 seconds.
CL
The display shows the result of total Chlorine + Ozone in mg/l.
RESULT
(value A).
Remove the vial from the sample chamber. Rinse vial and cap several
times.
Add one DPD No. 1 tablet and one DPD No. 3 tablet straight from
the foil and crush the tablets using a clean stirring rod.
Fill a second vial to the 10 ml mark with the sample.
Add one GLYCINE tablet (note 8) straight from the foil and crush the
tablet using a clean stirring rod.
WT.050.311.000.DM.IM.0119
P7 Advanced
= G x 1.9
= A – G
= C – A
= C + 4G
marks
marks
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