1. Each time you remove and reinstall a measuring cuvette, you must calibrate the PoolWaterLAB. Here is a video tutorial.  If you suspect that something is wrong with the test results, calibrate the PoolWaterLAB and then continue working. (use tap water for calibration)

2. Fill all three measuring chambers  with water sample, whether you are running one test or three. When filling the measuring cuvette with a water sample, use a syringe and focus on the divisions marked on each chamber to ensure the correct volume of water is added. (Remove the light protection cap to see the divisions on the measuring cuvette.)

3. Never leave the measuring cuvette with the water sample and reagent for a long time, as this will damage the measuring cuvette. Wash the measuring cuvette immediately after the test, preferably with clean tap water.

4. Do not touch the reagents with your hands!!!

5. Close the light protection caps well to prevent light from entering the measuring chambers.

6. Follow the instructions in the video tutorials for each test closely; every step is crucial and affects the results. It is obligatory to perform a Zero test with the water sample before adding any reagents, otherwise, you will not receive any results.