3.1 AA-6800/6650 Configurations
3-7
AA-6800/6650 Instruction
3.1.5 Burner
The AA-6800/6650 has a burner head with a 10 cm length slot (standard accessory) mounted in the premixing
atomizer chamber. This burner head can be used with air-acetylene flames and air (argon)-hydrogen flames.
Please specially install a high-temperature head (optional accessory) when using a nitrous oxide-acetylene
flame.
Figure 3.6 Burner
No. (in
Figure 3.6) Name Function
1 B
urner socket Insert the burner head into this port. The burner head is fixed
with the internal O-rings.
2 Nebulizer This uses air negative pressure to suction the sample solution
and spray it from the tip of the capillary as a mist of fine particles.
3 Impact bead This makes the fine particles of sprayed sample solution into
even finer particles, and larger particles are separated out.
4 Nebulizer retaining
plate and fixing
screw
Fixes the nebulizer to prevent it from coming off.
5 Spray chamber The particles of sprayed sample solution are mixed with the
combustion gas in this chamber.
6 Mixer Mixing of the particles and combustion gas is promoted.
7 Safety bung and
safety plug plate
In case of a flashback, this bung is open to prevent the burner
unit from being damaged. In case a flashback should occur and
the safety bung operates, refer to "Inspection Procedure in Case
of Flashback" on the yellow pages. In case that the safety bung
operates, a safety plug plate disappears. In ignition, confirm that
a safety plug plate appears. A flashback means a combustion or
explosion that occurs in the burner when the flame combustion
rate is fast and the mixed gas flow velocity is slow.
8 Drain discharge port Large particles are discharged from this port.
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