wtw PhotoLab Spektral Operating Instructions Manual page 118

12 Zero adjustment
The following display appears:
After approx. 2 s:
After approx. 5 s:
88
→ In the setup menu, call up the meter setup sub-
menu.
→
→ Call up the zero adjustment submenu.
→ Insert a cell with distilled water.
The message measuring... appears on the dis-
play.
→ Remove the cell.
The photometer performs an AutoCheck measure-
ment.
Successful zero adjustment for the 10 mm square
cell.