Brandtech-scientific Dispensette III Bedienungsanleitung PDF herunterladen (Seite 34)

Functions and Limitations of Use

Limitations of Use Operating Limitations

Dispensette

III never use with:

– liquids attacking Al

-ceramic, ETFE, FEP, PFA

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)**

Operating Exclusions

Dispensette

Organic never use with:

– liquids attacking Al

-ceramic, tantalum, ETFE,

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)**

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: Dispensette

III / Dispensette

Organic: up to 2.2 g/cm

Liquids, which form deposits may make the piston

difficult to move or may cause jamming

(e.g., crystallizing solutions or concentrated alka-

line solutions). If the piston becomes difficult to

move, the instrument should be cleaned immedi-

ately. (page 48).

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 Dispensette

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.

* Dissolved sodium azide permitted up to a

concentration of max. 0.1%.

** When stronger chemical resistance is needed,

use the PTFE screw caps. (Accessories

page 54)

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