Usage:

Before using this tester for the first time, you must calibrate it for your pool or spa water in the following order:

1. Test the water in your pool or spa using a conventional liquid test kit

2. Note the chlorine reading as needed.

3. No pH adjustment is required.

How to find the adjustment point for the chlorine test:

1. Insert one 1.5 V AA battery into the compartment in the handle.

2. Hold the tester in one hand and the probe in the other.

3. Place the cleaned metal probes into the water up to the black line.

4. Gently stir the water with the probe.

5. While keeping the probe in the water, turn the dial on the tester all the way to the left toward “Cl.” Slowly turn the dial back to the right until the needle aligns with the chlorine level recorded using a conventional liquid tester (e.g., 1.5 ppm).

6. Remove the probe from the water without touching the dial. The indicator will move all the way to the right and stop on a letter between “a” and “e.” This letter is your “calibration point.”

Note: Every time you use this tester to test the chlorine level, you must calibrate it to the “calibration point” before testing.