TEST 1 CHLORINE-FREE/5 OR CHLORINE-FREE/10
Standard Range: 0 - 5.00mg/l (ppm) Cl2 (use DPD 1) Extended Range: 0 - 10.0mg/l (ppm) Cl2 (use DPD XF) Color Change: Colorless - Purple/Red
1. Rinse test cuvette with sample leaving 2 or 3 drops in the tube.
2. Add one DPD 1 or DPD XF tablet, crush tablet and then fill the test tube with sample to the 10ml mark.
Mix to dissolve tablet fully and ensure no particles remain.
3. Take photometer reading immediately. The result may drift on standing.
4. Retain test solution if the Total Chlorine Follow-On Test is required.
TEST 2 CHLORINE-TOTAL/5 OR CHLORINE-TOTAL/10
Standard Range: 0 - 5.00mg/l (ppm) Cl2 (use DPD 3) Extended Range: 0 - 10.0mg/l (ppm) Cl2 (use DPD XT)
Color Change: Colorless - Purple/Red from Test 1 increases in intensity
Carry out this test on the solution remaining from the Free-Chlorine/5 test.
1. If any shock treatment chemicals have been added to the pool add one DPD Oxystop tablet, crush and
mix to dissolve. Stand for 1 minute before proceeding. This will prevent a false response caused
by the shock treatment chemicals.
2. Add 1 DPD 3 or DPD XT tablet, crush and mix to dissolve.
3. Stand for 2 minutes to allow full color development.
4. Take photometer reading after 2 minutes have elapsed.
Note: To obtain Combined Chlorine residual subtract Free Chlorine result from Total Chlorine result: Combined Chlorine = Total Chlorine - Free Chlorine
TEST 3 ACID pH PHENOR RED
Range: pH 6.5 - 8.5 Color Change: Yellow - Red
1. Fill test cuvette with sample to the 10ml mark.
2. Add 1 Phenol Red Tablet, crush and mix to dissolve completely.
3. Take photometer reading.
TEST 4 TOTAL ALKALINITY
Range: 0 - 500mg/l (ppm) CaCO3 Color Change: Yellow - Green - Blue
1. Fill test cuvette with sample to the 10ml mark.
2. Add 1 AlkaphotTM tablet, crush thoroughly and mix. Ensure all particles have dissolved completely.
3. Allow to stand for 1 minute.
4. Take photometer reading.
Note: If a thin yellow layer is observed at the bottom of the tube, the cuvette should be thoroughly remixed before measurement.
TEST 5 CALCIUM HARDNESS
Range: 0 - 500mg/l (ppm) CaCO3 Color Change: Violet - Orange
1. Fill test cuvette with sample to the 10ml mark.
2. Add 1 Calcicol No. 1 tablet, crush and mix to dissolve.
3. Add 1 Calcicol No. 2 tablet, crush and mix to dissolve.
4. Stand for 2 minutes.
5. Take photometer reading.
Note: This method is calibrated for standard pools. For saltwater/seawater pools, please use Test 34 Calc.Hard.Salt.
TEST 6 CYANURIC ACID
Range: 0 - 200mg/l (ppm) CNA Color Change: Clear - Cloudy (turbidimetric method)
Note: Cyanuric acid is also commonly referred to as "Chlorine Stabilizer" or "Pool Conditioner."
1. Fill test cuvette with sample to the 10ml mark.
2. Add 1 Cyanuric Acid tablet. DO NOT CRUSH. Allow to disintegrate for at least 2 minutes. A cloudy
solution indicates the presence of cyanuric acid
3. Crush any remaining undissolved tablet, mix fully and take photometer reading.