PerkinElmer aanalyst 200, User Manual

Page: 253 / 328

AAnalyst 200 User’s Guide
9-9
Burner Maintenance Checklist
Maintenance checklists for the burner system are presented below.
Burner system, maintenance checklist
If you analyze samples that have ‘dirty’ matrices, such as blood, sugar or oil, you will probably have to
clean the components more often than if you were analyzing ‘clean’ samples, such as drinking water.
Burner system Always rinse the burner system correctly before extinguishing the flame.
If you are analyzing samples with high solids content : Clean the burner chamber at
least once daily.
If you are using organic solvents : Clean the burner chamber before you switch to
aqueous solutions. Empty the drain vessel and dispose of hazardous solutions
properly.
If you are analyzing samples containing high concentrations of copper, silver, or
mercury : Thoroughly flush the burner chamber and drain tube immediately after
completing such analyses. Empty the drain vessel and dispose of hazardous solutions
properly.
Burner head Inspect the burner head for deposits before igniting the flame. The burner should
provide an even flame over the length of the burner slot. An uneven flame may
indicate that the slot needs cleaning. See page 9-19 for cleaning procedure.
Check the width of the burner slot periodically.
Nebulizer If there is an obstruction in the nebulizer, clear it using a copper cleaning wire.
Drain system Flush the drain system thoroughly at the end of each working day by pouring water
down the neck of the burner chamber.
Drain vessel Empty the drain vessel regularly. Do not allow it to fill with corrosive, toxic, or
organic solutions. Dispose of hazardous solutions properly.
Drain trap Periodically remove the drain trap and clean.
Drain tube Inspect the drain tube regularly for wear and/or chemical attack. Replace it if it has
deteriorated.
O-rings Check the condition of the o-rings regularly: burner end cap o-ring; o-ring in neck of
burner chamber; three o-rings on the nebulizer.
Gas hoses Check the gas hoses regularly for leaks, particularly at the fittings, using a proprietary
leak testing fluid. Call a PerkinElmer service engineer if a leak is detected.
Acetylene cylinder If the cylinder pressure falls to below 600kPa (6bar; 85 psig) some of the solvent
used to stabilize the acetylene (e.g. acetone) may be carried over into the burner. This
could influence the characteristics of the burner. Always change to a new acetylene
cylinder when the cylinder pressure falls to below this value.