wtw PhotoLab Spektral, Operating Instructions Manual

Page: 92 / 162

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9 Analytical Quality Assurance (AQA)
Example:
Method 14729 with a preset theoretical value of
15.0 mg/l and tolerance of 1.0 mg/l (CombiCheck 80).
Change to: theoretical value = 8 mg/l,
tolerance = 0.7 mg/l (CombiCheck 20).
→
Confirm with .
→
Input the new theoretical value, e. g. 8.0 mg/l, via
the numeric keypad.
Values in parentheses indicate the range in which
the theoretical value should move.
→
Confirm with .
→
Input the tolerance (0.7 mg/l) via the numeric key-
pad.
→
Confirm with .
Both standard and tolerance values have been over-
written.
The photometer returns to the standard solutions sub-
menu.