BANANA PURPLE PUNCH AUTO

The probes will need to be calibrated. I use a 4 and 7 solution to calibrate mine. Calibration frequency all depends on how often you use the probe and if you properly store them. Calibration solution is cheap so I calibrate mine every 4-6 weeks to be on the safe side. Hope this helps.

Calibrate them. Best to do it at the beginning of a grow and even mid way to ensure its operating correctly. typically the solutions are 4.01 + 7.01 + 10.01, in growing we really only need a two point calibration from 4.01 to 7.01, food industry uses the 10.1 and other solutions. Some units are automatic other you need to turn a screw to move the meter numbers up or down. Good Luck!

Buy a ph calibration solution 7.0ph value. Then hold the calibration botton until it starts to calibrate then press enter when u see the value 7.0 on your meter when dipping it in the solution then press enter. Then you will have the right values! You have to do it they don’t work otherwise! I wish you good luck my friend! 😊