Waters GCT Premier Operator's Manual page 308

FI Tune tab parameters: (Continued)
Parameter
Set Maximum Emitter
Current button
Emitter Current
Flash Off Current
Heater Current
B-30 The MassLynx Tune window
Description
Opens the Emitter Current Control dialog box.
You can specify the maximum emitter current to
be used. For FI mode, use 10 mA.
The current that is passed through the emitter
during an acquisition or tuning.
For maximum sensitivity, this parameter is
Tip:
normally set to zero.
Sets the emitter current, which is used during the
inter scan delay. This function desorb any
condensed material on the emitter and ensures
maximum sensitivity. (A value of 3 to 8 mA can be
required).
The current passed through the extraction rods to
heat the rods. The rods are normally heated when
using waxy samples.
The absolute sensitivity of the instrument
Note:
decreases when the rods are heated.
The rods should normally be left cold
Note:
The graph below shows the increase in tempera-
ture as the current applied to the rods is increased.
Heated FI rods
Current /mA