ProMinent DULCOTEST DT1B Operating Manual page 23

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
8. The METHOD symbol flashes
for approximately 3 seconds
ð The result in mg/l of total
chlorine appears in the dis‐
play.
c) combined chlorine
Combined chlorine = total
chlorine minus free chlorine
Calculate the combined chlorine
d) Chlorine together with chlorine
dioxide
1. Fill a cuvette with a 10 ml water
sample
[GLYCINE] tablet
2. Insert a
directly from the foil into the
water sample and crush the
[GLYCINE] tablet with a stirring
rod
3. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth until the
tablet has dissolved
[!] and
4. In a second 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
5. Remove the cuvette from the
sample chamber for the zero
correction and empty the cuv‐
ette out
6. 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
7. Pour the contents of the first
[GLYCINE] solution)
cuvette (
into the prepared cuvette
8. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth
9. Place the cuvette in the sample
chamber
ð Observe the correct posi‐
tioning of the cuvette.
10. Press the key
[METHOD] flashes for
ð
approximately 3 seconds.
The display value
chlorine dioxide reappears
in the display.
11. Remove the cuvette from the
sample chamber
12. Thoroughly clean the cuvette
and the cuvette lid
Analysis methods
[ZERO/TEST]
[G] =
23