BRAND Dispensette S Instrucciones De Manejo página 46

2 Safety Instructions
2.2 Function
With the Dispensette® S Trace Analysis bottle-top dispenser, liquids can be dispensed directly from
the supply bottle. The instruments are marked DE-M and optionally equipped with recirculation valve.
2.2.1 Operation
When the instrument is correctly used, the dispensed liquid comes into contact with only the follow-
ing chemically resistant materials:
Various fluoroplastics (e.g. ETFE, FEP, PFA, PCTFE, PTFE), Al
lum depending on the version (see label on the dispensing tube and the recirculation valve).
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 3.8 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. 65.
•
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 car-
tridge, p. 68.
•
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 given.
2.5 Operating Exclusions
2.5.1 Dispensette® S Trace Analysis
Never use Dispensette® S Trace Analysis for:
•
Liquids that attack Al
(e.g., dissolved sodium azide*)
•
Liquids that are decomposed catalytically by platinum-iridium (e.g., H
Take notice of the valve spring material of the instrument version in use
46
Operating manual
2
/s (dynamic viscosity [mPas] = kinematic viscosity [mm
3
])
3
O -sapphire or flouroplastics such as ETFE, FEP, PFA, PCTFE, and PTFE
2 3
O -sapphire, platinum-iridium or tanta-
2 3
O ) or attack tantalum.
2 2
2
/s] x
997491