BRAND Titrette Instrucciones De Manejo página 67

3. Calculation
x
= Weighing results
i
Z = Correction factor
(e.g. 1.0029 ml/g at 20 °C, 1013 hPa)
Mean
Mean volume
Accuracy*
Standard deviation*
Coefficient of
variation*
Calculation for accuracy (A%) and coefficient of variation (CV%): A% and CV% are calculated using the
formulas of statistical quality control.
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n
Number of weighings
=
∑
x
–
i
x
=
n
–
x – . Z
=
V
–
–
V
V
0
A% =
V
0
V
Nominal volume
=
0
Z .
s =
100 s
CV% =
–
V
10 Checking the Volume (Calibration)
. 100
–
2
∑ x
x )
( –
i
– 1
n
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Operating manual