ProMinent DULCOTEST DT1B Operating Manual page 32

Analysis methods
Chlorine with tablets 0.01 ... 6.0 mg/l
[MODE] key to select [Cl] .
Use the
a) Free chlorine
1. Take your cuvette set 1
2. 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
3. Remove the cuvette from the
sample chamber and empty the
cuvette down to the last few
drops
[DPD No. 1] tablet
4. Insert a
directly from the foil into the
water sample and crush the
[DPD No. 1] tablet with a stirring
rod
5. Fill the cuvette up to the 10 ml
marking with the water sample
6. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth until the
tablet has dissolved
7. Position the cuvette in the
sample chamber
ð Observe the correct posi‐
tioning of the cuvette.
8. Press the key
[METHOD] flashes for
ð
approximately 3 seconds.
32
[ZERO/TEST]
The result in mg/l of free
chlorine appears in the dis‐
play.
b) Total chlorine
1. Take your cuvette set 2
2. 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
3. Remove the cuvette from the
sample chamber and empty the
cuvette down to the last few
drops
[DPD No. 1] tablet
4. Insert a
directly from the foil into the
water sample and crush the
[DPD No. 1] tablet with a stirring
rod
[DPD No. 3] tablet
5. Insert a
directly from the foil into the
water sample and crush the
[DPD No. 3] tablet with a stirring
rod
6. Fill the cuvette up to the 10 ml
marking with the water sample
7. Close the cuvette with the cuv‐
ette lid and mix the contents by
tipping back and forth until the
tablets have dissolved
8. Place the cuvette in the sample
chamber
ð Observe the correct posi‐
tioning of the cuvette.