Operating Limitations; Operating Exclusions - BRAND Dispensette S Instrucciones De Manejo

Functions and Limitations of Use
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 2.2 g/cm

Operating Exclusions

Dispensette S never use with:
®
– liquids attacking Al
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
– hydrochloric acid > 20 % and nitric acid > 30 %
– 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 (screw cap)**
* Dissolved sodium azide permitted up to a concentration of max. 0.1%.
**
When stronger chemical resistance is needed, use the ETFE/PTFE screw caps ('Accessories', page 58).
36
/s
2
3
O -ceramic, ETFE, FEP, PFA
2 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 immediately
(page 49).
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.
Dispensette S 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 applications, e.g.
for production and administration of food, pharma-
ceuticals or cosmetics are not available.
S Organic never use with:
Dispensette
®
– liquids attacking Al O
2
FEP, PFA and PTFE (e.g., dissolved sodium
azide*)
– liquids attacking borosilicate glass (e.g.,
hydrofluoric acid)
– bases and saline solutions
– explosive liquids (e.g., carbon disulfide)
– suspensions (e.g., of charcoal) as solid particles
may clog or damage the instrument
– liquids attacking PP (screw cap)**
-ceramic, tantalum, ETFE,
3