wtw inoLab Level 3 Operating Manual page 120

Ion concentration
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6 Add standard solution (1 Vol.% of the sample
solution).
7 Start the measurement with [Start].
A window for the entry of data opens.
8 Enter Standard volume, Standard concentration and
Ion type with
9 Continue the measurement with [Start].
10 Add the standard solution (2 Vol% of the sample
solution).
11 Continue the measurement with [Start].
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and [Next].