GE MOA 280i - Measurement Menu

GE Analytical Instruments ©2006 DLM 14291 Rev. A
3-3
Figure 3-5:Measurement Menu (Nitric Oxide Mode)
V A C U U M P U M P P A S S
C O O L E R T E M P P A S S
C E L L P R E S S P A S S
S U P P L Y P R E S S T E S T I N G
P M T S I G N A L
E N T = S T A T U S C L R = S T O P
Fi
g
ure 3-4: Start-u
p
Screen.
• Check the PMT cooler temperature to see if it is –12 ± 2 °C.
• Wait until the reaction cell pressure is < 100 torr.
• Check the ozone supply pressure is >4 psig (6 psig recommended).
• Turn on the PMT and record an ozone-off baseline signal.
• Turn on the ozone generator, and wait for an increase in the PMT signal
due to the background chemiluminescence from ozone.
• Display the PMT signal in the Measurement Display.
If any of the above conditions are not met, the start-up screen will FAILED for
that test. Pressing ENTER from the Start-up Screen will display the Status
Screen to aid in troubleshooting failed tests. Pressing CLEAR will return to the
Analysis Menu.
Measurement Menu
Once the start-up testing is completed, the Measurement Menu is displayed.