Tintometer CHECKIT Comparator D55 Mode D'emploi page 4

Instructions for the determination of chlorine (DPD)
Free, combined and total chlorine
CHECKIT Disc
®
Chlorine
Accuracy: ± 5 % full scale
Tablets
DPD No. 1 - free chlorine
DPD No. 3 - combined and total chlorine
Free chlorine (DPD No. 1-tablet)
Fill both cells to the 10 ml mark and
lid in the left-hand compartment of the comparator as a blank.
Add one DPD No. 1-tablet in the other cell.
with a clean stirring rod, close it with a lid and swirl it until the
tablet has dissolved.
right-hand compartment of the comparator. Hold the compa-
rator diagonally so that enough north day light enters the
cuvette. The mirror unit makes use of the view through the
entire length of the cuvette.
mg/l free chlorine.
Total and combined chlorine
(with the addition of DPD tablet No. 3)
Having completed the test for free chlorine,
the right-hand compartment of the comparator and add one
DPD No. 3-tablet.
replace the lid and swirl the cell until the tablet is dissolved.
Remove lid. Place the cell in the right-hand compartment and
allow for 2 minutes reaction time. Hold the comparator diago-
nally so that enough north day light enters the cuvette.
Measurement Range
0.02 - 0.3 mg/l Cl
Order Code (per 100 pcs)
Remove lid. Place this second cell in the
Crush the tablet with a clean stirring rod,
Order Code
14 60 00
2
51 10 60
51 10 80
place one cell without
Crush the tablet
Read off the result in
take the cell from
1
2
3
4
5