Step 1: Rinse the TDS Water Quality Tester with reverse osmosis water. Step 2: Fill a small glass with RO water and use the TDS Water Quality Tester to read the TDS. Key in your results below. RO Water Result: Please fill water value Step 3: Rinse the TDS Water Quality Tester with RO water again. Then test your tap water with your TDS Water Quality Tester and key in your results below. Tap Water Result: Please fill Tap Water value Step 4: Click on the calculate button below to view your results. Refresh Button not acceptable for drinking ideal for drinking Good for drinking Fair for drinking Excellent for drinking Not acceptable and not fit for drinking. No Value
