adjusted to give the volumes as specified with water. During calibration, the performance is checked with 5
weighings at the minimum, median and maximum volumes of the volume
specifications according to EN ISO 8655
The EN ISO 8655 standard gives the accuracy and precision
limits as both absolute and relative values. The values are
specified for fixed single channel air displacement pipettes.
With variable volume pipettes, the nominal volume is the maximum
selectable volume. The µl limit of the nominal volume applies to
every selectable volume throughout the volume range. For example,
for a 10-100 µl pipette the maximum permissible accuracy limit is
0.8 µl and the maximum permissible precision limit is 0.3µl. With
multichannel pipettes these values are further doubled.
and NCCLS testing guidelines in our
Environment Controlled Laboratory on NIST (National Institutes of Standards and Technology) traceable
equipment using a 6-place Precision Balance.
GMP/GLP, compliant laboratory
practices including Standard Operating Manuals and documented
employee training records.