Error Limits - BRAND seripettor Operating Manual

6 Error limits

20 °C
!
Ex
Error limits
Nominal volume A* ±
%
ml
2 1.2
10 1.2
25 1.2
*A = Accuracy, CV = Coefficient of Variation
Partial volume
The percentage values for A and CV are relative to the nominal volume (V
partial volumes (V ).
p
V
N
. A
A
=
T
V
T
e.g.
V
N
V = 50% N
T
V = 10% N
T
*A = Accuracy, CV = Coefficient of Variation
The maximum error for a single measurement can be calculated from the sum of error limits EL = A + 2
× CV (e.g. for 10 ml: 120 µl + 2 x 20 µl = 160 µl).
997468
Error limits in relation to the nominal capacity (= maximum
volume) indicated on the instrument at equal temperature
(20 ºC/68 °F) of instrument, ambient environment and dis-
tilled water. Testing takes place according DIN EN ISO 8655-
6 with a completely filled instrument and with uniform and
smooth dispensing.
A* ±
µl
24
120
300
N
Volume A* ±
%
10 1.2
5 2.4
1 12
CV*
%
0.2
0.2
0.2
A* ±
μl
120
120
120
NOTICE
6 Error limits
CV*
µl
4
20
50
) and must be converted for
N
CV* CV*
% μl
0.2 20
0.4 20
2.0 20
Operating manual
53