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9. Error Limits
Error limits 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
Nominal volume
A*
≤ ± %
ml
2
0.5
5
0.5
10
0.5
25
0.5
50
0.5
100
0.5
Partial volume
The percentage values for A and CV are relative to the nominal
volume (V
) and must be converted for partial volumes (V
N
V
N
A
=
· A
T
V
N
P
e.g.
Volume
V
25.0
N
V
= 50% N
12.5
T
V
= 10% N
2.5
T
*A = Accuracy, CV = Coefficient of Variation
Note:
The error limits in DIN EN ISO 8655-5 are satisfied with a
significant margin. The maximum error for a single measurement
is calculated from the sum of error limits EL = A + 2 × CV
(e.g., for the 25 ml size: 125 µl + 2 x 25 µl = 175 µl).
40
CV*
µl
≤ %
10
0.1
25
0.1
50
0.1
125
0.1
250
0.1
500
0.1
A*
CV*
≤ ± %
≤ %
µ
l
0.5
125
0.1
1.0
125
0.2
5.0
125
1.0
µl
2
5
10
25
50
100
).
p
µl
25
25
25
20 °C
Ex
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