Safety Practices and Hazards
Agilent 55B AA Spectrometer User’s Guide 13
Heat, vapors and fumes
The heat, vapors and fumes generated can be hazardous, toxic, or otherwise
injurious to personnel.
Heat, vapors and fumes must be extracted from the instrument by means of an
exhaust system.
The instrument must be vented into a self-contained arrangement of collector
hood, ducting and exhaust fan.
The system must be vented to the outside air, never within the building.
Position the system outlet so that the exhaust cannot re-enter the building
through any door, window, air conditioning inlet, or other ventilator.
Construct the system in accordance with the appropriate codes and
regulations for ventilation.
The exhaust system must be capable of an exhaust ventilation rate of at least 6
cubic meters per minute (200 scfm).
Locate the exhaust fan at least 3 meters (10 feet) away from the flame and as
close to the outlet as possible.
The motor must be mounted away from the hot gases, and plastic parts must
not be used as they will melt.
Fit a back-draft damper to the outlet end of the system.
Equip the exhaust fan power supply with a pilot light situated immediately
adjacent to the instrument to indicate whether the exhaust fan is on or off.
ALWAYS switch the exhaust fan on BEFORE lighting the flame.
Use fireproof ducting which is in accordance with your local fire prevention
regulations.
Locate the ducting away from fire alarms, sprinkler heads and other heat-
sensitive devices.
Do not make solder joints in the ducting—the hot exhaust in the duct may melt
the joint.
Regularly check the system by smoke test to ensure that the exhaust system is
functioning correctly.
When operating the atomic absorption spectrometer, ALWAYS have the chimney
in place to ensure correct ventilation.
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