Biohit PROLINE Prospenser Operating Manual page 30

Calculations (for the nominal volume)
∑ x
_
i
Mean value x =
n
_
_
Mean volume V = x · Z
Z = correction factor
(e. g. 1.0029 µl/mg at 20 °C, 1013 hPa)
Accuracy
_
V - V
0
A% = · 100
V
0
Standard deviation
_
√
∑ (x
- x ) 2
1
s = Z ·
n - 1
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x = results of weighings
i
n = number of weighings
V = nominal volume
0
Coeffi cient of variation
100 s
_
CV% =
V
Berechnung (für Nennvolumen)
∑ x
_
Mittelwert x =
n
Mittleres Volumen V
Z = Korrekturfaktor
(z. B. 1,0029 µl/mg bei 20 °C, 1013 hPa)
Richtigkeit
_
V - V
0
R% = · 100
V
0
Standardabweichung
√
∑ (x
1
s = Z ·
n - 1
– 29 –
x = Wäge-Ergebnisse
i i
n = Anzahl der Wägungen
_
_
= x · Z
V = Nennvolumen
0
Variationskoeffi zient
_
- x ) 2 100 s
_
VK% =
V