Stanford Research Systems
UGA Series Universal Gas Analyzers
Guide to Operation
2 – 12
1.
Push the “Level-up” button to enter the main menu of
UGA.
2.
Select “System Bake”.
3.
Select “Bake Time”.
4.
Set the baking time in hours (2-00) and press the enter
key.
5.
Select “Bake Temperature”.
6.
Select “Elbow”.
7.
Use the arrow keys to set the elbow bake-out temperature
(40 - 20 °C) and press the enter key.
8.
Select “Chamber”.
9.
Use the arrow keys to set the chamber bake-out
temperature (40 - 20 °C) and press the enter key.
0.
Select “On” and press the enter key to start the bake out.
The display will show the time remaining on the bake, the tempera-
ture of the elbow and chamber.
Note that because the user can enter the system bake from any state
except leak test, the UGA will automatically configure itself for a
system bake. During this process, the system bake LED will blink
and the sample heat LED is off. After the UGA reaches the proper
setting, the sample heat LED will be lit and the system bake LED
will remain lit. At the end of the bake, the UGA will turn off the
heaters and will return to the ready state by turning on the RGA
and the IG.
The UGA can perform a software-independent (stand-alone) leak
test from the front panel. When the UGA is engaged in the Leak
test function, however, this function will block RGA communica-
tions from a remote PC until it is ended. UGA control software
will show RGA and Current Mode LED’s are flashing and indicates
the current mode is Leak Test. Only the front panel can control the
Leak test function. And this function only starts when the UGA is
in the Ready state. The Leak test function can check for gas leaks
from a system under test, sniff from a pressurized system or helium
leak test from an evacuated system attached to the RGA chamber.
2.2.2.9 Leak Test
