Quantity: One piece Before using it for the first time, please set the tester in the following order for the swimming pool water or hot spring water to be tested: 1. Use traditional liquid testing tools to test the swimming pool water or hot spring water; 2. Record the chlorine reading for backup (1.5PPM); 3. No need to adjust the pH. Find the setting point of the tester: A. Insert a 1.5V AA battery (positive side up) into the battery slot on the handle. B. Hold the tester with one hand and the test rod with the other. C. Insert the cleaned metal rod into the water to the black position. D. Use a metal rod to gently stir the water. E. When the metal rod is kept in the water, turn the knob on the front of the watch in the CL direction until it can no longer be moved. Then slowly adjust it to the right until the pointer points to the traditional The position of the result measured by the liquid test tool (such as 1.5). F. Take the test rod out of the water, being careful not to move the knob. The pointer will slide to the right and stop with a letter between A and E. This letter is the adjustment point. Note: Before each chlorine test, the meter must be set to the "adjustment point". Testing the pH value: The recommended chlorine content for swimming pool water or hot spring water is 7.2-7.8 A) Leave the test stick in the water, turn the knob in the pH direction to make a beep (the battery must be removed when reading the pH value). B) Wait until the pointer stops swinging and take a pH reading. C) Gently dry the test rod, insert it into the slot next to the tester, and store it. Test the chlorine content: The recommended chlorine content of swimming pool water or hot spring water is 1.2 to 1.7 ppm. A) Adjust the pointer to the "set point" position. B) Holding the tester in one hand and the test rod in the other, insert the metal rod into the water to the black position. Read the reading after the pointer stops swinging. C) Leave the test stick in the water and continue to perform the pH test according to the instructions. Specification 1. Essential tools for swimming pools, saunas and hot springs 2. The ideal tool for simply measuring the PH and C12 values of water 3. No chemical composition, no need to guess for measurement 4. Chlorine content level within the safe measurement range: 1.2-1.7 ppm 5. PH level within the safe measurement range: 7.2-7.8 6. Battery: Use 1 AA battery Storage method: In order to extend the service life of the PC-101 swimming pool tester and ensure the measurement, Please note: 1. When not in use, please set the knob to the closed position (adjust the PH direction until it can no longer be moved). 2. Store in a cool, dry place and avoid direct sunlight. 3. Do not immerse the test stick in any liquid other than swimming pool water and hot spring water. 4. Regularly check if the battery power is sufficient - the tester uses a 1.5V "AA" alkaline battery. Good quality product.