3 Basic Operation
3.12 Igniting the FPD
29FPD-2010
3.
Setting detector to On
In the FPD detector screen, when the detector control is set to [Off], place the cursor on [Off] and
change the detector control to [On] using the right/left keys of the cursor.
4.
Igniting the FPD
(1) Before igniting the FPD detector, confirm that the detector gas is supplied.
(2) Confirm that the FPD detector is set to [On].
(3) Confirm that each APC controller of H2 and AIR is set to [On] and appropriate value is set to each
flow rate.
(4) Press the [Ignite] key of the PF menu. A message saying “Ignition started” appears at the lower left
on the screen.
(5) When ignition operation completes correctly, a message saying “Ignition finished” appears at the
lower left on the screen. The flame section on the DET screen changes to [On] and ignition ends.
Also, the picture display of the hydrogen flame of the FPD detector on the [MONIT] screen changes
from the dotted line to white.
Flame = On Flame = Off
Fig. 3.12.2
(6) When ignition fails, ignition operation is performed again. On this occasion, a message saying
“Ignition is retried” appears at the lower left on the screen. Re-ignition operation is performed for six
times. If ignition fails in six times, a message saying
“DET #4 Ignition failed” and ignition operation
ends.
When the above error message is displayed, refer to “6 Troubleshooting”.
During the use of FPD, the baseline may fluctuate periodically in spite that the hydrogen flame has
been ignited correctly. Water drops adhering to the exhaust ventilation may be the cause. In such a
case, stop the detector according to
“3.16 Stopping the Detector”, remove the head, and purge the
ventilation unit sufficiently with appropriate gas to eliminate water drops, and then perform ignition
again.
CAUTION
To prevent deterioration of photomultiplier, turn OFF the power before
dismounting the head.
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