PerkinElmer aanalyst 200 User Manual page 156

Operation of the Instrument
There are two ways to alter the gas flow rates while you are performing the optimization
procedure:
•
Touch the flow field to display the Flow dialog and then enter the required flow rate in this
dialog.
or
Touch the increase (<)
•
The system checks that the flow rate values you have entered are within the safe working range.
Optimization procedure
1. Touch the Flame tab to display the Flame page.
2. Aspirate the blank solution and when the signal is steady touch the Auto Zero Graph button.
3. Aspirate the standard solution.
4. Initially, adjust the fuel and oxidant flow rates to obtain the type of flame given in the
Recommended Conditions.
5. Then, make incremental changes to the fuel and oxidant flow rates alternately while at the
same time observing the continuous graphics display. Continue to make adjustments until you
find the flow rates that give maximum absorbance reading.
NOTE: After making a small change in the flow rate, wait a few seconds to allow the flame to stabilize
before making further changes.
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or decrease (;) arrows