The Drain System; Flashbacks - PerkinElmer AAnalyst 700 User Manual

Tomic absorption spectrometer
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Safety/Regulatory Information

The drain system

Always place the drain vessel in a well ventilated place underneath the
spectrometer, in full view while you are working with the spectrometer. This
prevents the build-up of potentially hazardous gases, and allows you to see the
liquid level.
Never use a glass drain vessel.
Do not kink, fold, or loop the drain tube.
Never place the drain tube directly into a laboratory sink.
Empty the drain vessel frequently; especially do not allow the drain vessel to
fill with organic solvent.
Thoroughly flush the drain system, as described in the guide, when you shut
down the system.
Check the condition of the drain tube regularly, especially if you use organic
solvents. Replace the drain tube when it first shows signs of cracking or
discoloration.

Flashbacks

A flashback is an explosion of the premixed gases in the spray chamber. The
safety interlocks normally prevent conditions that could cause a flashback, but if
a flashback should ever occur:
Check that the burner head slot is clean.
Make sure that you are using compressed air and not oxygen-enriched air.
Check the flow spoiler or impact bead for damage, and replace any damaged
parts.
Carefully check and tighten all connections to, and seals on, the burner unit,
and check the gas flow settings before you attempt to ignite the flame.
Seepage of fuel and oxidant from the spray chamber may cause a flashback.
Check that the burner head is seated correctly.
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