Thermo Scientific AI 3000, Руководство по эксплуатации

Страница: 82 / 108

4
AI 3000/AS 3000 II Control
Control Through the TRACE GC Ultra
64 AI 3000/AS 3000 Sampling System - Operating Manual Thermo Scientific
Extended Control Menu
In this menu it is possible to set how long the syringe needle must remain inside the injector
without injecting. This allows to avoid discriminations caused by evaporation of the sample
contained in the syringe needle. In this way the sample is completely drawn into the syringe
and the needle left inside the injector and heated for a few seconds before injecting. See
Table 9 for details.
Table 9. Control Through the TRACE GC Ultra: Extended Control Menu
Menu Range Comments
EXTENDED
CONTROL This line shows the menu title.
Viscous sample Yes, No This parameter defines the speed at which the
sample is drawn from the vial as a function of
the sample viscosity. Select No (default value) if
the sample has low viscosity. Select Yes if the
sample has high viscosity.
Sampl. depth Bottom,
Center
selectable in
the submenu This parameter determines the penetration
depth of the syringe needle into the vial.
Press Mode/Type or Enter to enter the
submenu.
• Selecting Bottom (default value) the needle
goes down to the vial bottom.
• Selecting Center the needle goes down to
half vial.
Inj. Depth Standard,
Minimum
selectable in
the submenu This parameter determines the penetration
depth of the syringe needle into the injector.
Press Mode/Type or Enter to enter the
submenu.
• Selecting Standard (default value) the
needle goes down to the maximum depth
allowed.
• Selecting Minimum the needle enters the
injector and stops immediately beyond the
septum (Cold Needle Technique).