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

3.3 Limitations of Use

This instrument is designed for dispensing liquids, observing the following physical limits:
• Operating 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
3
density [g/cm ])
• Density up to 2.2 g/cm

3.4 Operating Limitations

• Liquids, which form deposits may make
the piston difficult to move or may cause
jamming (e.g., crystallizing solutions or
concentrated alkaline solutions). If the
piston movement becomes sluggish or
stiff, the instrument should be cleaned
immediately (Cleaning, p. 56).
• When dispensing inflammable media,
make sure to avoid to buildup of static
charge, e.g., do not dispense into plastic
vessels; do not wipe instruments with a
dry cloth.

3.5 Operating Exclusions

3.5.1 Dispensette S
®
Never use Dispensette S for:
• Liquids attacking Al
FEP, PFA and PTFE (e.g., dissolved
sodium azide*)
• Liquids attacking borosilicate glass (e.g.,
hydrofluoric acid)
• Liquids which are decomposed catalyti-
cally by platinum-iridium (e.g., H
• Hydrochloric acid > 20 % and nitric acid >
30 %
• Tetrahydrofuran
* Dissolved sodium azide permitted up to a concentration of max. 0.1 %.
** Alternatively, ETFE/PTFE bottle adapters and ETFE/PTFE screw caps can be used (accessories from
Accessories/spare parts, p. 66). The suitability of ETFE/PTFE bottle adapters and ETFE/PTFE screw
caps must be checked by the user.
9974 90
2
/s (dynamic viscosity [mPas] = kinematic viscosity [mm
3
O -ceramic, ETFE,
2 3
O )
2 2
• The instrument is designed for general
laboratory applications and complies
with the relevant standards, e.g. DIN EN
ISO 8655. Compatibility of the instrument
for a specific application (e.g., trace ma-
terial analysis, food sector etc.) must be
checked by the user. Approvals for spe-
cific applications, e.g. for production and
administration of food, pharmaceuticals
or cosmetics are not available.
• Trifluoroacetic acid
• Explosive liquids
• Carbon disulfide
• Suspensions (e.g., of charcoal) as solid
particles may clog or damage the instru-
ment
• Liquids attacking PP (screw cap and bot-
tle adapter)**
3 Safety Instructions
2
/s] x
41
Operating manual