Download LTQ Hardware

3
System Shutdown, Startup, and Reset
Resetting the Mass Spectrometer
• After three minutes, the System LED turns yellow to indicate the software transfer
from the data system to the mass spectrometer is complete and that the mass
spectrometer is in standby mode. When you change the mode from standby to on,
the System LED turns green to indicate that the mass spectrometer is functional and
the high voltages are on.
Note The Vacuum LED on the front panel illuminates green only if the pressure
in the vacuum manifold is below the maximum allowable pressure (5 × 10-4 Torr
in the analyzer region, and 2 Torr in the ion transfer tube–skimmer region).
Although you can calibrate the mass spectrometer after the vacuum LED turns
green, you must allow the mass spectrometer’s vacuum system to stabilize
completely, which takes approximately 15–24 hours of continuous pumping, to
ensure that the calibrations are correct.
Starting the Autosampler
Turn on the autosampler by using its on/off power switch. If necessary, configure the
autosampler. For procedures for placing sample vials, preparing solvent and waste containers,
installing syringes, and so on, refer to the autosampler manual. The LTQ Series Getting
Connected Guide provides autosampler connection procedures.
Resetting the Mass Spectrometer
If communication is lost between the mass spectrometer and data system computer, you
might need to reset the mass spectrometer by using the reset button on the right-side power
panel, shown in Figure 8 and Figure 9 on page 14.
The following procedure assumes that the mass spectrometer and data system computer are
both powered on and operational. If the mass spectrometer, data system computer, or both are
off, see “Starting the System after a Complete Shutdown” on page 37.
 To reset the mass spectrometer after communication is lost
1. Ensure that the Communication LED is off.
2. Press the Reset button on the power panel.
The following occurs:
• The embedded computer reboots. All LEDs on the front panel turn off except the
Power LED.
• After several seconds, the Communication LED turns yellow to indicate that the data
system and the mass spectrometer are starting to establish a communication link.
Thermo Scientific
LTQ Series Hardware Manual
39