Turn on the TDS meter. You might see a little blinking zero or a previous reading. Dip the probe into the water—don’t go past the immersion line (usually marked on the pen). Stir it gently to release air bubbles.
How To Measure Tds In Drinking Water - Printable Free Templates
Now wait. Count to ten like you’re in a slow-motion movie. The number will stabilize. That’s your TDS, measured in parts per million (ppm). Write it down if you’re a nerd. (I would.)
