Checking The Volume - BRAND Transferpette S Digital Instrucciones De Manejo

Checking the Volume

Depending on use, we recommend inspection of the instrument every
3 to 12 months. The cycle can, however, be adjusted to individual
requirements.
The gravimetric testing of the pipette volume is performed according to
the following steps and is in accordance with DIN EN ISO 8655, Part 6.
1.
Set nominal volume
2.
Condition the pipette
3.
Carry out the test
26
Set volume to the maximum volume indicated
on the instrument (see page 24 for proce-
dure.
Condition the pipette before testing by using
a pipette tip to aspirate and discharge the
test liquid (distilled H
this, discard the pipette tip.
a) Attach new pipette tip and pre-rinse
one time with test liquid.
b) Aspirate liquid and pipette it into the
weighing vessel.
c) Weigh the pipetted quantity with an
analytical balance. (Please follow the
operating manual instructions from the
balance manufacturer.)
d) Calculate the volume, taking the tempe-
rature into account.
e) At least 10 pipettings and weighings in
three volume ranges (100%, 50%, 10%
of nominal volume) are recommended for
statistical analysis.
O) five times. After
2