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Changing chromatographic conditions 3-43
To ignite the lamp manually (when the lamp icon on the Home screen
has an X)
1. Press Lamp (press Shift, 1). The lamp control screen appears again with
0 hours and 00 minutes in the “Lamp has been on” field.
2. Press Lamp (press Shift, 1) again to turn the lamp on. Once the lamp is
ignited, the Home screen appears with the X removed from the lamp
icon.
You can conserve lamp life by programming its automatic operation via a
timed event method.
To program the lamp to turn on or turn off, select the Timed events option in
the Method choice list, or program the lamp through one of the external
contact closures.
• See page 3-15 and page 3-34 for more information on programming lamp
operation using a timed event.
• See page 3-27 for more information on programming the lamp through
the external contact closure.
Changing chromatographic conditions
Requirement:
When the detector is plumbed to the chromatographic system,
and the buffer type or pH of the mobile phase is changed, you must remove the
previous buffered mobile phase from the fluid path.
To change chromatographic conditions
1. Set the drift tube temperature at the appropriate desolvation
temperature setting.
Tip:
50 °C (122 °F) is an appropriate desolvation temperature for most
solvents.
2. To remove mobile phase from the fluid path of the detector, replace the
buffered mobile phase with 100% HPLC-quality water, and flush the
system for 10 minutes at 3 mL/min.
Caution:
Failure to remove all traces of buffered mobile phase from the
fluid path before changing new conditions could result in buffer
precipitation and consequent clogging of the nebulizer.