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Idiomas disponibles
Idiomas disponibles
novAA 800
2.5.3
Safety instructions relating to the formation of ozone and toxic vapors
2.5.4
Safety instructions for compressed gas cylinders and systems
When using graphite furnace technique, do not look into the graphite furnace
opening without wearing protective goggles. Sputtering sample substances and hot
graphite particles may cause eye and face injuries.
High temperatures occur during flame and graphite furnace operation. Do not
touch hot parts such as the burner head or the graphite furnace during or immedi-
ately after a measurement. Observe the required cooling times.
Do not wear any metallic jewelry (especially around the neck) when working with
the novAA 800 D and G. Not observing this instruction may cause a short circuit in
the electrically heated furnace. In case of a short circuit, the jewelry may become
very hot and cause burns.
Electromagnetic dispersion fields with flux densities ≤ 100 µT occur in the vicinity
of the sample chamber due to the heating of the graphite tube.
When using graphite furnace technique, the sound level may rise up to 55 dBA. If
the nitrous-oxide-acetylene flame blows back into the mixing chamber, the mo-
mentary sound level lies below 130 dBA.
The UV radiation of the hollow cathode lamps (HCL, D
flame causes an interaction with the surrounding air to form toxic concentrations of
ozone exceeding the permissible limit. Furthermore, toxic byproducts may escape from
the samples or while the samples are processed.
Observe the following note:
The novAA 800 may only be operated when the exhaust unit is activated.
Always keep the sample chamber closed when the flame is lit.
Observe the following notes:
The operating gases (argon, acetylene and nitrous oxide) are taken from com-
pressed gas containers or local compressed gas systems. The required purity of the
gases must be ensured.
Pure oxygen or oxygen-enriched air must not be used as an oxidant when using
flame technique. There is a risk of explosion.
Work on compressed gas cylinders and systems must only be carried out by individ-
uals with specialist knowledge and experience in compressed gas systems.
The safety instructions and guidelines for operating compressed gas cylinders or
compressed gas systems that apply at the operating location must be strictly com-
plied with.
Compressed air hoses and pressure reducers may only be used for the assigned
gases.
Incoming piping, screwed joints and pressure reducers for nitrous oxide (N
be kept free of grease.
Pay particular attention to escaping acetylene! Combined with air, acetylene forms
highly flammable mixtures. The gas can be identified by its distinct garlic-like odor.
Safety instructions
-HCL) and the N
O/acetylene
2
2
2
O) must
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