Thermo Scientific AQUAfast AQ3700, User Manual

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7
Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
13. Remove the vial from the sample chamber, empty the
vial, rinse vial and cap several times. Fill with a few
drops of the water sample .
14. Add
one DPD No. 1 tablet
straight from the foil and
crush the tablet using a clean stirring rod.
15. Add water sample to the 10 ml mark.
16. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
17. Place the vial in the sample chamber making sure that
the marks are aligned.
18. Press TEST key.
19. Remove the vial from the sample chamber.
20. Add
one DPD No. 3 tablet
straight from the foil to the
same water sample and crush the tablet using a clean
stirring rod.
21. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
22. Place the vial in the sample chamber making sure that
the marks are aligned.
23. Press TEST key.
Wait for a
reaction period of 2 minutes
.
After the reaction period is finished the measurement
starts automatically.
The result is shown in the display in:
as Chlorine dioxide in mg/l Chlorine,
or
as Chlorine dioxide in mg/l ClO
2
.
mg/l free Chlorine
mg/l combined Chlorine
mg/l total Chlorine
Notes:
See next page.
T1 accepted
prepare T2
press TEST
Countdown
2:00
T2 accepted
prepare T3
press TEST
*,** mg/l free Cl
*,** mg/l comb. Cl
*,** mg/l total Cl
*,** mg/l ClO
2
[Cl]
*,** mg/l ClO
2