Api Source; Ion Source Interface - Thermo Scientific LTQ Series Hardware Manual

Main Power Switch
Electronics Service Switch
Reset Button

API Source

Ion Source Interface

Thermo Scientific
In the Off position, the Main Power (circuit breaker) switch removes all power to the mass
spectrometer, including the external forepump or forepumps. In the On position, power is
supplied to the mass spectrometer. In the standard operational mode, the switch stays in the
On position.
CAUTION To shut off all power to the mass spectrometer in an emergency, place the main
power circuit breaker switch (labeled Main Power) in the Off (down) position. Do not use
the electronics service switch.
The electronics service switch is a circuit breaker. In the Service Mode position, the switch
removes power to all components of the mass spectrometer except for the fans and vacuum
system. This setting allows you to service nonvacuum system components with the vacuum
system still operating. In the Electronics Normal position, all components of the mass
spectrometer have power.
When you briefly press the reset button, the embedded processing system and digital circuitry
reset and the system software reloads from the data system. For information about resetting
the mass spectrometer, see
The API source forms gas phase sample ions from sample molecules that are contained in
solution. The API source also serves as the interface between the LC and the mass
spectrometer. You can operate the API source in the ESI, H-ESI, NSI, APPI, or APCI mode.
For more information about the API source, refer to Chapter 2, "Setting Up the API Source,"
in the LTQ Series Getting Started Guide.
The ion source interface for the LTQ Series mass spectrometer consists of the components of
the API source that are held under vacuum (except for the atmospheric pressure side of the
sweep cone) in a vacuum chamber that the one or two forepumps evacuate.
The ion sweep cone is a metal cone over the
a physical barrier that protects the entrance of the ion transfer tube and increases source
robustness.
The ion transfer tube is a metal, cylindrical tube that assists in desolvating ions produced by
the API probe while transferring them into the vacuum system.
"Resetting the Mass Spectrometer"
API ion transfer
2
Functional Description
Mass Spectrometer
on page 39.
tube. The ion sweep cone acts as
LTQ Series Hardware Manual
ion
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