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Common problems
The following troubleshooting chart provides solutions to some common
problems you may encounter during routine AA analysis.
Please note that this list is not exhaustive.
Table 10. Common faults
Fault
Agilent 55B AA Spectrometer User's Guide
1
Oxidant pressure low
2
Burner fault
3
Liquid trap fault
4
Spray chamber bung
fault
5
Lack of control of
gas flows
6
High oxidant flow
7
Flame sensed with
no flame
8
Igniter flame too
short
Check
a) Check gas supply pressure.
a) Check the burner type is correct for the selected
flame type and it is correctly installed.
a) Check liquid trap is full and float is free to move.
b) Check the operation of the liquid trap interlock in the
burner adjuster.
a) Check pressure relief bung is correctly installed in the
spray chamber.
b) Check operation of pressure relief bung interlock.
a) Check as for 1a).
b) Check for blockages in gas supply lines.
a) Check O-rings in nebulizer block.
b) Check nebulizer is correctly assembled and adjusted.
c) Check for leaks.
a) Too much light in the sample compartment. Ensure
chimney and flame shields are fitted. Turn off nearby
lights.
b) Flame sensor faulty.
a) Low acetylene pressure, check supply.
b) Check that igniter solenoid operates correctly.
c) Check for blockage or carbon in igniter capillary.
Troubleshooting/Errors
137
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