7.5 If to remove the main unit, use screwdriver to take off screws.
8. ADJUSTMENT OF SUBMERSIBLE SENSOR TUBE
8.1. It is suggested that the sensor tube should submerge into water 10cm
(3.9")
deep (see
Fig. 20);
8.2. Turn the nut loose counterclockwise, move the extension tube up and down to
make it proper, then turn the nut tight clockwise (see Fig. 21-1/2/3/4).
11
Fig 19-1
Fig 19-3
Fig 19-4
Fig 19-2
Fig 20
