wtw photolab S12 Operating Instructions Manual page 64

8. 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).
40
1
– Confirm with .
– Enter 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.
1
– Confirm with .
– Input the tolerance (0.7 mg/l) via the numeric
keypad.
1
– Confirm with .
Both standard and tolerance values have been over-
written.
1
– Confirm with .