500 795/Rev D/07-14
Page 35
6. Depress the ignition switch and hold down. Watch the
FLM
indicator in the
window. When this indicator is illuminated the flame is a light and the ignition switch
be released. If the
FLM
indicator does not light within approximately 20
release the switch and open the
fuel
valve one additional turn. Allow the gas to disperse
continuing. Depress the ignition switch for a further 20 seconds. This process may
repeated until successful ignition occurs. If the
fuel
valve has to be opened more than
turns more than recommended above, refer to Section
7. Set the
filter select
control to the desired
8. Aspirate deionised water and set the readout to zero by adjusting the
blank
9. Aspirate a standard solution of slightly higher concentration than expected in
samples to be tested. Adjust the
fine and coarse
control until a positive reading
obtained. This is a nominal value to be used in optimising flame
10. Adjust the
fuel
valve in a clockwise direction until a peak reading is
NOTE: There is a time delay between adjusting the flow of fuel and
the
effect of the adjustment. A pause of a few seconds is
necessary
between making every fine
The optimum flame conditions are different for Na and K
retuning is necessary when switching between
11. For optimum performance the instrument should be allowed 15 minutes to
During this warm-up period a blank deionised water sample should be aspirated.
should be noted that results, adequate for most purposes, can be obtained from
on, although standardisation settings will need frequent checking during the
DOMINIQUE DUTSCHER SAS
