Why does the pH value jump in the display of the JBL ProFlora pH Control Touch?
If the pH value is subject to greater fluctuation, this is an indication of interference from another electronic device. Ballasts in light bars, for instance, create an electromagnetic field if they are not shielded against interference. This can disturb the sensitive sensor. When you unplug the power plug from the outlet the pH value should suddenly stabilise. You can carry this process out with every electrical device in the aquarium to find the source of interference.
By using separated power-carrying cables further disturbances can be avoided. Separating electrical circuits may also prove to be a good idea. The JBL pH Control Touch units are manufactured and tested in accordance with EMC directives and do not interfere with other technical items. Thus the JBL pH Control Touch does not expose wearers of pacemakers to any danger.
If another technical item disturbs your pH control, then it has not been electromagnetically shielded in accordance with this technical standard.