204 Advanced Operation Manual
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. Scroll to Temp er atu re and
input the desired value, and press [Enter]. It must be
greater than 120 °C for the flame to light.
3 Scroll to H2 flow and change the hydrogen flow rate, if
desired. Press [Enter]. If the flame is not lit, press [Off/No]
to turn off the flow. (It is not good practice to pass
uncombusted hydrogen into the air. The hydrogen flow
will be turned on automatically when igniting the flame.)
4 Scroll to Air flow and change the air flow rate, if desired.
Press [Off/No] to turn off the flow for now.
5 If you are using packed columns, turn off the makeup gas
and proceed to step 9.
6 If you are using capillary columns, scroll to the Makeup
parameter:
a Verify that makeup gas type is the same as that
plumbed to your instrument. The configured gas type is
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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