106 Advanced User Guide
5 Detectors
Manual ignition
1 Press [Front Det] or [Back Det].
2 Scroll to Flame. Press [On/Yes]. The flame ignition sequence
begins.
Automatic ignition
If the FPD output with the flame on falls below the flame-off
output plus the Lit offset value, this is interpreted as a flame-out
condition. The FPD runs the flame ignition sequence to relight
the flame. If this fails, it runs the sequence again. If the second
attempt also fails, the detector shuts down all functions except
temperature and makeup gas flow.
Setting parameters for the FPD
1 Press [Front det] or [Back det].
2 Set the detector temperature. It must be greater than 120 °C
for the flame to light.
3 Change the hydrogen flow rate, if desired. Press [Off/No].
4 Change the air flow rate, if desired. Press [Off/No].
5 If you are using packed columns, turn off the makeup gas
and proceed to step 9.
6 If you are using capillary columns:
a Verify that makeup gas type is the same as that plumbed
to your instrument (next to Makeup in the parameter list).
Change the gas type, if necessary.
b If your capillary column is defined, choose a flow mode
and set the makeup gas flow or combined flow.
c If your capillary column is not defined, enter a makeup
gas flow. Only constant flow is available.
7 Scroll to Flame and press [On/Yes]. This turns on the air and
hydrogen and initiates the ignition sequence.
WARNING
Verify that a column is installed or the FPD fitting is plugged
before turning on the air or hydrogen. An explosion may occur if
air and hydrogen are allowed to leak into the oven.
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