Chlorine test setup point: Before first use, set up the tester for pool water or hot spring water to be tested in the following order: 1. Use traditional liquid test tools to test the water pool or hot spring water 2. Record chlorine readings available for use (1.5 PPM) 3. No pH adjustment needed. Find the tester's set point: A. Insert a 1.5V AA battery (positive side up) into the battery compartment in the handle. B . Hold the tester in one hand and the test stick in the other.C. Insert the cleaned metal rod into the water to the black position.D. Gently stir the water with a metal rod.E. When the metal rod is kept in water, turn the knob on the front of the watch in the CL direction until it can no longer be turned. Then slowly adjust to the right until the pointer points to the position of the result measured by the traditional floating the test tool (eg 1.5).F. Pull the test stick out of the water and be careful not to move the button. The pointer slides to the right and stops with a letter between A and E. This letter is the point adjustment. Note: Before each chlorine test, the meter must be set to " set point".Test of pH value: The recommended chlorine content of pool water or hot spring water is 7.2-7.8A) Leave the test stick in the water and turn the knob in the direction of pH to emit a beep (the battery must be removed when reading PH).B) Wait until the pointer stops swinging and take a pH reading. C) Gently wipe the test stick, insert it into the slot next to the tester and store it. Test Chlorine Level: The recommended chlorine level in pool water or hot spring water is 1.2 to 1.7 ppm A) Set the pointer to the "set point" position. B) Hold the tester in one hand and the test stick in the other hand, insert the metal stick into the water to the black position. Wait until the pointer stops swinging and take a reading. C) Leave the test stick in the water and continue to perform the pH test according to the instructions.specification 6. Battery: use 1 AA batteryStorage method:To extend the life of PC-101 pool tester and ensure accurate measurement,Note: 1. When not in use, turn the knob to the closed position ( in the PH direction until it cannot be turned anymore).2. Store in a cool, dry place and avoid direct sunlight.3. Don't Do not immerse the test stick in any liquid other than pool water and hot spring water. 4. Check regularly if the battery is sufficient - the tester uses a 1.5V AA alkaline battery