ProMinent DULCOTEST DT1B Operating Manual page 25

d) Chlorine together with ozone
1. In a 24 mm cuvette add a 10 ml
water sample and carry out a
zero correction, see
Ä „Switching on and zero cor‐
rection" on page 13
2. Remove the cuvette from the
sample chamber and empty the
cuvette completely
3. Hold the dropping bottle upright
and by slow pressing, add equal
sized drops into the cuvette:
6 drops ➨ DPD 1 buffer sol‐
n
ution
2 drops ➨ DPD 1 reagent
n
solution
3 drops ➨ DPD 3 solution
n
Fill the cuvette up to the 10 ml
marking with the water sample
4. Close the cuvette using the cuv‐
ette lid
5. Mix the contents of the cuvette
by tipping it back and forth
6. Position the cuvette in the
sample chamber
ð Observe the correct posi‐
tioning of the cuvette.
7. Switch the countdown on, see
Ä „ Switching the countdown
function on" on page 14 . To do
this, press the
[ZERO/TEST] key
ð Wait for the 2 minutes reac‐
tion time to elapse
[!] and
8. The METHOD symbol flashes
for approximately 3 seconds
ð The result of Total chlorine
+ ozone = display value
appears in mg/l in the dis‐
play.
9. Remove the first cuvette from
the sample chamber
10. Thoroughly clean the cuvette
and the cuvette lid
11. Fill a second cuvette with a 10
ml water sample
[GLYCINE] tablet
12. Insert a
directly from the foil into the
water sample and crush the
[GLYCINE] tablet with a stirring
rod
13. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth until the
tablet has dissolved
14. Hold the dropping bottle upright
and by slow pressing, add equal
sized drops into the first cuvette:
6 drops ➨ DPD 1 buffer sol‐
n
ution
2 drops ➨ DPD 1 reagent
n
solution
3 drops ➨ DPD 3 solution
n
15. Pour the contents of the second
[GLYCINE] solution)
cuvette (
into the prepared cuvette
16. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth
Analysis methods
[A]
25