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9. Error Limits
Error limits according DIN EN ISO 8655-5 related to the nominal capacity
(= maximum volume) indicated on the instrument, obtained when instrument and
distilled water are equilibrated at ambient temperature (20 °C/68 °F). Testing takes
place according DIN EN ISO 8655-6 with a completely filled instrument and with
uniform and smooth dispensing.
Error limits VITLAB
Dispenser TA
®
Nominal volume
ml
10
* A = Accuracy, CV = Coefficient of Variation
Partial volume
The percentage values for A and CV are relative to the nominal volume (V
must be converted for partial volumes (V
V
N
A
=
· A
T
N
V
T
e.g.
volume
V
10.0
N
V
= 50% N
5.0
T
V
= 10% N
1.0
T
* A = Accuracy, CV = Coefficient of Variation
Note:
The error limits are well within the limits of DIN EN ISO 8655-5.
The maximum error limit for a single measurement can be calcu-
lated EL = A + 2 CV (for volume 10 ml: 50 µl + 2 x 10 µl = 70 µl).
38
2
A* ≤ ±
%
µl
0.5
50
).
T
A* ≤ ±
%
µl
0.5
50
1.0
50
5.0
50
CV* ≤
%
µl
0.1
10
) and
N
CV* ≤
%
µl
0.1
10
0.2
10
1.0
10
20 °C
!
Ex
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