5. Tilt the electrode in a small angle so that the open filling up hole must be
higher than the closed one. Please press the bolus up until water appears
on the open filling up hole. With this process you de-aerated the bolus.
6. Put the electrode in a horizontal position. Ask for help to hold the electrode.
Push the bolus up with one of the tip of your fingertips you reach the
electrode’s metallic plate. The excess water is taken off from the bolus with
the shown procedure.