Roth Rotilabo II Mode D'emploi page 29

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
viscosity [mPas] = kinematic viscosity [mm²/s] x
density [g/cm³])
– Density up to 2.2 g/cm
Operating Exclusions
Dispenser never use with:
– liquids attacking Al O
2
and PTFE (e.g., dissolved sodium azide*)
– liquids attacking borosilicate glass (e.g.,
hydrofluoric acid)
– liquids which are decomposed catalytically by
platinum-iridium (e.g., H
– nitric acid > 60%
– tetrahydrofuran
– trifluoroacetic acid
– explosive liquids (e.g., carbon disulfide)
– suspensions (e.g., of charcoal) as solid particles
may clog or damage the instrument
– liquids attacking PP (closure cap)**
* Dissolved sodium azide permitted up to a concen-
tration of max. 0.1%.
** When stronger chemical resistance is needed, use
the ETFE/PTFE adapter (‚Accessories and Spare
Parts', page 46).
/s (dynamic
2
3
-ceramic, ETFE, FEP, PFA
3
O )
2 2
Operating Limitations
Liquids, which form deposits may make the piston
difficult to move or may cause jamming (e.g.,
crystallizing solutions or concentrated alkaline solu-
tions). If the piston movement becomes sluggish
or stiff, the instrument should be cleaned immedi-
ately (page 40).
When dispensing inflammable media, make sure
to avoid to buildup of static charge, e.g., do not
dispense into plastic vessels; do not wipe instru-
ments with a dry cloth.
The instrument is designed for general labora-
tory 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 ap-
plications, e.g. for production and administration
of food, pharma- ceuticals or cosmetics are not
available.
Storage Conditions
Store the instrument and accessories only in clea-
ned condition in a cool and dry place. Storage
temperature: from -20 °C to +50 °C
(from -4 °F to 122 °F).
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