Introducing the MSQ
System Overview ________________________________________________________________________
Table 1-1. Instrument status light
Instrument Status
Light
Vented Red
Venting Red
Pumping down
Flashing yellow
Under vacuum (above
vacuum trip)
Red
Under vacuum (ready
for use)
Yellow
Operate on (MSQ in
use)
Green
Source enclosure open
Red
The vacuum trip is the pressure below which it is safe to switch on the
voltages in the source. When the instrument is functioning normally, the
status light will go from flashing yellow to solid yellow and Operate can be
switched On. If the pressure in the instrument rises above the operating
pressure, the status light turns red to indicate that the pressure is above a
safe level. See the chapter
Shutting Down and Restarting the System
for
information on pumping down the MSQ.
Figure 1-4 shows the MSQ with the doors open. The source enclosure and
reference inlet are now visible.
Source
enclosure
Reference
inlet
Figure 1-4. The MSQ with the doors open
1-6
___________________________ MSQ Hardware Manual ____________________________