Bluelab Combo Meter Cleaning & Calibration

Any pH or Electrical Conductivity (EC) meter is only accurate when the probes are kept clean and the unit is properly calibrated. This video demonstrates how to easily clean the probes and calibrate the pH on the Bluelab Combo pH/EC/Temp Meter. Visit hydrodynamicsintl.com for more information.

[@eeecchhoo]

this is crap directions... You'll need to press and hold the ph/calibrate button when callibrating then press the CAL 7.0 or Cal 4.0