Checking The Volume - BRAND Transferpette-8 Operating Manual

6 Checking the volume

6 Checking the volume
We recommend testing the instrument every 3 to 12 months, depend-
ing on the level of use. However, the testing cycle can be adapted to
meet individual requirements. Gravimetric volume testing of the pipette
is carried out according to the following steps and complies with DIN
EN ISO 8655, Part 6.
1. Setting the nominal volume
Set the maximum specified instrument volume.
2. Conditioning the pipette
Condition the pipette before testing by aspirating and dispensing the
test liquid (H
3. Performing the test
In accordance with DIN EN ISO 8655-2, a tip change is recom-
mended after each individual measurement. An exception to this rule
can be made, according to DAkkS guideline DKD-R8-1.
a. Aspirate the test liquid and pipette into the weighing vessel.
b. Weigh the pipetted amount with an analysis scale. (Please refer to
the user manual of the scale manufacturer.)
c. Calculate the pipetted volume. In doing so, take into account the
temperature of the test liquid.
d. At least 10 pipetting series and weighings in 3 volume ranges
(100%, 50%, 10%) are recommended.
Operating manual
46
O distilled) with a pipette tip five times.
2
NOTICE
Transferpette® S-8/-12 9974 89 V1