1. If using a TDS meter without temperature compensation, the calibration solution should be room temperature: approximately 23°C – 27°C.
2. Place TDS meter probe in the calibration solution.
3. After the reading on TDS meter is steady, adjust meter to give correct reading.
4. Rinse probe with water.
5. For best results, cross calibrate with TDS Calibration Solution 1000 ppm.