Calibration to pH 7.0 and pH 4.0 is required. 6.0 Hydration. Hydrate the pH pen tip in Bluelab pH Probe KCl Storage Solution before first use and after cleaning fileslib. Follow the instructions to hydrate and calibrate your pen, and submerge the probe in your nutrient reservoir to view the measurement on the display. Successful calibration indicator: Selectable units for °C and °F Fully guaranteed for 1 year (with proof of purchase): Auto-off function Double junction probe: Automatic Temperature Compensation (ATC) Hold reading function: Fully waterproof Calibrate button. See calibration section. Units button. Press and hold until units flash then short press to change units. Screen will change back to main
Add enough Bluelab pH Probe KCl Storage Solution to submerge the probe tip. Leave to soak for at least 24 hours. After hydration, always calibrate the pH pen to
Before use begins Hydrate in water for 24 hours before you start using the pen. Calibrate the pen before you start using the pen. See section 6.0 To operate