Error Limits - BRAND Dispensette TA Operating Manual

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 Dispensette
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
and must be converted for partial volumes (V
V
N
A = · A
V
T N
T
e.g. volume
V
N
V = 50% N
T
V = 10% N
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 calculated EL = A + 2 CV (for volume 10 ml: 50 µl + 2 x 10 µl = 70 µl).
36
TA
®
A* ≤ ±
% µl
0.5 50
A* ≤ ±
% µl
10.0 0.5 50
5.0 1.0 50
1.0 5.0 50
CV* ≤
%
0.1 10
).
T
CV* ≤
%
0.1
0.2
1.0
µl
)
N
µl
10
10
10
20 °C
!
Ex