PC102 Pool Water Quality Tester 1. You must prepare a 1.5 ppm chlorine solution, the purpose of your pool water inspection 2. If you are at 1.5ppm chlorine level or not (don't know if it is or can't find the calibration point), please use the traditional test strip > 3. Once you are happy with your calibration, you do not need to recalibrate unless you change the measuring pool to use different pool water. A brief description: The design of the risepro tester is suitable for swimming pools or SPA family ratios (excluding salt lake water pools, industrial or scientific use).After the first successful calibration, you can test the levels of chlorine and acido -basic of your swimming pool water in a simple and fast way. Therefore, there is no need for 'traditional combinations of liquid chlorine and acid-base'. complicated and messy With this handy tester, you can quickly test whether your chlorine and pH are in the ideal range of 7.8: chlorine 1.2 1.7 ppm and pH 7.2 lied. If your test results are beyond this range, please leave you a useful information and a corresponding pool that adapts to chlorine, acid and alkali. It is definitely a great tool you may need to keep the pool water clean. Specification: The recommended chlorine level for the swimming pool and SPA is 1.2, 1.7 ppm It is recommended that the pool and SPA PH level is 7.2, 7.8 Size (CM): Host: 190 x 120mm Probe with handle: 150mm long Probe (only): 48MM long (black strap not included in delivery ) Cable (only): 130mm long Power supply: 1 x 1.5V AA alkaline battery Weight: 160g (without battery) One set contains: 1 x PH value, Cl2 tester, probe 1 x manual