Pahlen Autocheck 3i, Manual, Page: 9 / 14

9
Autocheck 3i
MA70-10E
ENGLISH
• Combined chlorine
Combined chlorine = the value of total chlorine minus the value of free chlorine (ppm (mg/l)
• Free chlorine with liquid reagent
1. Select “CL6” on the display by repeatedly pressing the “Mode” button.
2. Carry out zero point calibration in accordance with points 1–4 above.
3. Once “0.00” is shown in the display, remove the measurement glass from the meter and empty its contents. Fill the measure-
ment glass with drops of equal size by holding the bottle vertically and gently squeezing: 6 drops DPD1 buffer solution
2 drops DPD1 reagent solution
Fill with measurement water up to the 10 ml line.
Close the cover securely. Turn the measurement glass several times to mix the contents.
4. Place the measurement glass in the meter with the triangles lined up with each other.
5. Press the “Zero/Test” button. After approx. 3 seconds, the result will be shown in the display in ppm (mg/l) of free chlorine.
• Total chlorine using liquid reagent
6. Immediately after obtaining the free chlorine measurement result - fill with: 3 drops of DPD3 solution in the already coloured
solution.
Close the cover securely. Turn the measurement glass several times to mix the contents.
7. Place the measurement glass in the meter with the triangles lined up with each other. Wait 2 minutes for a colour reaction.
8. Press the “Zero/Test” button. After approx. 3 seconds, the result will be shown in the display in ppm (mg/l) of total chlorine.
Once the test has been completed, clean the measurement glass, cover and crushing rod under running tap water using
the brush.
• Tolerances, chlorine measurement using liquid reagent
Test method CL6, measurement range 0.02–4.0 mg/l
Measurement range Tolerance
Chlorine 0–1 mg/l ±0.05 mg/l
1–2 mg/l ±0.10 mg/l
2–3 mg/l ±0.20 mg/l
3–4 mg/l ±0.30 mg/l
pH test using tablet or liquid reagent
1. Select “pH” on the display by repeatedly pressing the “Mode” button.
2. Carry out zero point calibration.
3. Once “0.00” is shown in the display, remove the measurement glass from the meter.
With tablet: Place a tablet marked “Phenol red/Photometer” in the meter. Using the crushing rod, crush and stir
the tablet until it has been completely dissolved. Screw on the cover.
With liquid reagent: Fill the measurement glass with drops of the same size by holding the bottle vertically and carefully
squeezing in 6 drops of PHENOL RED solution. Close the cover securely. Turn the measurement
glass several times to mix the contents.
4. Place the measurement glass in the meter with the triangles lined up with each other.
5. Press the “Zero/Test” button. After approx. 3 seconds, the pH value will be shown in the display.
Once the test has been completed, clean the measurement glass, cover and crushing rod under running tap water using the brush.
• Tolerances, pH measurement
Test method pH using test tablet pH using liquid reagent
Measurement range Tolerance Measurement range Tolerance
pH
6.5–8.4 ±0.1 6.5–8.4 ±0.2
Cyanuric acid test
1. Select “Cys” on the display by repeatedly pressing the “Mode” button.
2. Fill the measurement glass with 5 ml of sample water and 5 ml of deionised water (or distilled water, battery water or tap water
that is free from cyanuric acid). Carry out zero point calibration. After approx. 8 seconds, “0.00” will be shown on the meter.
3. Once “0.00” is shown on the display, remove the measurement glass from the meter and place a tablet marked “Cyanuric Acid”
in the meter.
Using the crushing rod, crush and stir the tablet until it has been completely dissolved. The sample may take on a milky
colour if there is cyanuric acid present in the water. Screw on the cover and gently shake the measurement glass until the
tablet has been completely dissolved.
4. Place the measurement glass in the meter with the triangles lined up with each other.
5. Press the “Zero/Test” button. After approx. 3 seconds, the result will be shown in the display in ppm (mg/l) of cyanuric acid.
Once the test has been completed, clean the measurement glass, cover and crushing rod under running tap water using the brush.