Error Limits - BRAND Titrette Mode D'emploi

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 up to the nominal or partial volume.
Comparison of error limits:
Volume Partial volume
ml ml
25 25
12.5
2.5
50 50
25
5
* A = Accuracy, CV = Coefficient of Variation ** EL = Error limits
The maximum resolution of the display
in the 25 ml instrument: 0.001 ml, and above a 20 ml titration volume is 0.01 ml;
in the 50 ml instrument: 0.002 ml, and above a 20 ml titration volume is 0.01 ml.
Note:
The maximum error limit for a single measurement can be calculated EL = A + 2 CV.
The maximum EL for 25 ml size is ± 30 µl and for 50 ml size ± 50 µl.
This proves that the error limits for Class A burettes per DIN EN ISO 385
are met.
Titrette
®
bottle-top burette
A* CV*
≤± % µl ≤ %
µl
0.07 18 0.025 6
0.14 18 0.05 6
0.70 18 0.25 6
0.06 30 0.02 10
0.12 30 0.04 10
0.60 30 0.20 10
Requirements for piston
burettes according to
DIN EN ISO 8655-3
A* CV*
≤± % µl ≤ %
µl
0.2 50 0.1 25
0.4 50 0.2 25
2 50 1 25
0.2 1 00 0.1 50
0.4 1 00 0.2 50
2 1 00 1 50

Error Limits

20 °C
!
Ex
Glass burette
Class A acc. to
DIN EN ISO 385
EL**
± µl
30
30
30
50
50
50
45