Start Up
Flame optimisation
After the initial 2 minutes of start-up, once the internal pump has
turned to operating speed; while viewing the flame through the
inspection port, slowly adjust the gas flow with the Fuel-
Adjustment valve located on the side panel allowing the flame to
respond.
The correct height of the flame is achieved when the small inner
cones of the flame are 8-12mm high.
If the gas flow is too low the flame will start but “lift off” the flame
spreader and the flame will extinguish. It is recommended to start
off with a slightly larger flame and reduce it once the flame has
stabilised.
Be aware that opening the gas adjustment valve by too great an
increment could result in flames occurring outside the chimney
housing, leading to injury.
Aspiration
Aspirate deionised water through the aspiration tube connected to
the nebuliser. The tube should be fully immersed in the solution
and aspirated continuously at all times, other than when standards
and samples are being measured. This ensures no air is drawn into
the system and stable burner temperature is maintained for
consistency of results.
Warm up
Once the instrument has been through the start-up routine and the
flame is lit, it will be necessary to perform a warm-up period of 45
minutes to 1 hour. During this time deionised water should be
aspirated continuously to allow the instrument to stabilise its
temperature and to clean out any deposits from previous use which
may have built up in the needle, nebuliser and mixing chamber.
NOTE: Deionised water should be aspirated at all times during
warm-up and when the unit is between sampling to ensure the
temperature remains stable, ensuring accuracy of results when
testing recommences.
The recommended warm-up times, based on testing in a controlled
environment are detailed below:
Ambient Recommended warm-up
16˚C 45 minutes
21˚C 40 minutes
25˚C 30 minutes
18
To Next Page
Loading...
Need help?
General