Metrohm 807 Dosing Unit - Manual (Page 38)

3.8 Assembling the dosing unit
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807 Dosing Unit
Figure 25 Piston stopper flush with the upper edge of the housing
8 Check the stopcock setting.
9 Rotate the centering tube (interior) until the two triangles on the
upper side of the dosing unit are lined up with one another.
Figure 26 Triangles on the upper side of the dosing unit when the
stopcock is set correctly
10 Screw on all tubings and the adsorber tube.
Figure 27 Dosing unit completely mounted