BRAND Dispensette TA Mode D'emploi page 27

Limitations of Use
This instrument is designed for dispensing liquids,
observing the following physical limits:
– use temperature from +15 °C to +40 °C (from
59 °F to 104 °F) of instrument and reagent
– vapor pressure up to max. 600 mbar. Aspirate
slowly above 300 mbar, in order to prevent the
liquid from boiling.
– kinematic viscosity up to 500 mm
(dynamic viscosity [mPas] =
kinematic viscosity [mm²/s] x density [g/cm³])
– Density: up to 3.8 g/cm
Operating Exclusions
Dispensette TA must never be used with:
®
– liquids attacking Al O
2
like ETFE, FEP, PFA
and PTFE (e.g., dissolved sodium azide*)
– liquids which are decomposed catalytically
by platinum-iridium (e.g., H
Depending on the construction of the instrument.
– organic solvents
– trifluoroacetic acid
– explosive liquids (e.g., carbon disulfide)
– suspensions (e.g., of charcoal) as solid particles
may clog or damage the instrument
* Dissolved sodium azide permitted up to a
concentration of max. 0.1%.
Functions and Limitations of Use
/s
2
3
sapphire or fluoroplastics
3
O ) or tantalum.
2 2
Operating Limitations
Liquids, which form deposits may accelerate wear
on the piston seal, and make the piston difficult
to move or may cause jamming (e.g., crystallizing
solutions or concentrated alkaline solutions). If the
piston becomes difficult to move, the instrument
should be cleaned immediately (page 39).
The Dispensette TA is designed for general labo-
®
ratory applications and complies with the relevant
standards, e.g. DIN EN ISO 8655. Compatibility of
the instrument for a specific application (e.g., trace
material analysis, food sector etc.) must be checked
by the user. Approvals for specific applications, e.g.
for production and administration of food, pharma-
ceuticals and cosmetics are not available.
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