Burners - Agilent Technologies 240 Series AA User Manual

Burners

Improper or careless use of burners can create explosion hazards and fire hazards
that can cause death, serious injury to personnel and damage to equipment and
property.
Whenever you handle burners, remember that the burner may be very hot. Always
use protective gloves to handle burners. Note the burner will remain hot for some
time after the flame has been turned off.
Burners are clearly identified by the fuel/oxidant combination for which they are
intended. Always fit the correct burner. Never attempt to use an air-acetylene
burner for nitrous oxide-acetylene, as this causes a flashback.
If the width of the burner slot exceeds 0.47 mm (0.0185 in) for a nitrous-
oxide/acetylene burner or 0.54 mm (0.021 in) for an air/acetylene burner, the
burner cannot be refurbished and must be replaced with a new one.
To ensure safe operation of burners:
Use only acetylene as the fuel gas.

Use only air or nitrous oxide as oxidant. Never attempt to use oxygen or

oxygen-enriched air, as this causes a flashback.
Burner interlocks are incorporated to minimize the possibility of using the

wrong burner. Never interfere with or attempt to bypass any interlock fitted to
this instrument.
To minimize the rate of burner blockage, the burner slot must be cleaned and

polished as described in the 'Maintenance' section.
Never allow burners to become blocked. Progressive burner blockage can

increase the static pressure in the liquid trap to the point at which the liquid
seal is breached. This can cause a flashback and create an explosion hazard
or a fire hazard.
Never allow carbon to build up on the slot, as glowing particles can dislodge

and fall through the slot, causing a flashback.
Always turn off the flame before attempting to clean the burner slot. Never

clean the slot of a burner while a flame is running.
Never leave a flame unattended.

Never disassemble or modify a burner. Never use a damaged burner.

Agilent 240/280 Series AA (including Zeeman)
Safety Practices and Hazards
19