Limitations Of Use; Operating Limitations; Operating Exclusions - BRAND Dispensette S Operating Manual

2 Safety Instructions

2.3 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 liq-
uid from boiling
•
Kinematic viscosity up to 500 mm
density [g/cm
•
Density up to 2.2 g/cm

2.4 Operating Limitations

•
Liquids that form deposits (e.g., crystallizing solutions or concentrated alkaline solutions) may
make the piston difficult to move or may cause jamming. If the piston movement becomes slug-
gish or stiff, the instrument should be cleaned immediately. See also Cleaning, p. 62.
•
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).
•
If hazardous media (e.g., hydrofluoric acid or bromine) are dispensed, replace the dispensing
unit after approx. 3000 complete strokes. Replacement may also be necessary earlier depending
on the medium dispensed and the frequency of use. See also Replacing the dispensing cartridge.
•
The instrument is designed for general laboratory applications and complies with the require-
ments of the relevant standards (e.g., DIN EN ISO 8655). Compatibility of the instrument for a
specific application (e.g., trace material analysis or food sector) must be checked by the user. Ap-
provals for specific applications (e.g., for the production and administration of food, pharmaceu-
ticals, or cosmetics) have not been granted.

2.5 Operating Exclusions

2.5.1 Dispensette S
Never use Dispensette® S for:
•
Liquids that attack Al
FEP, PFA, and PTFE (e.g., dissolved sodium
azide*)
•
Liquids that attack borosilicate glass (e.g.,
hydrofluoric acid)
•
Liquids that are decomposed catalytically
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 %.
46
Operating manual
2
/s (dynamic viscosity [mPas] = kinematic viscosity [mm
3
])
3
-O -ceramic, ETFE,
2 3
O )
2 2
•
Trifluoroacetic acid
•
Explosive liquids
•
Carbon disulfide
•
Suspensions (e.g., activated charcoal) be-
cause solid particles may clog or damage
the instrument
•
Liquids that attack PP (screw cap and bottle
adapter)**.
2
/s] x
997490