BrandTech Scientific Dispensette TA - Manual (Page 36)

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20 °C
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36
Error limits
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).
Nominal volume
ml A* ≤ ±
%
µl
CV* ≤
%
µl
10 0.5 50 0.1 10
* A = Accuracy, CV = Coefficient of Variation
Error limits Dispensette ® TA
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.
Note:
Partial volume
The percentage values for A and CV are relative to the nominal volume (V
N
)
and must be converted for partial volumes (V
T
).
V
N
V
T
A
T
= · A
N
e.g. volume A* ≤ ±
% µl
CV* ≤
% µl
V
N
10.0 0.5 50 0.1 10
V
T
= 50% N 5.0 1.0 50 0.2 10
V
T
= 10% N 1.0 5.0 50 1.0 10
* A = Accuracy, CV = Coefficient of Variation