54 Model 5380 PFPD Operator’s Manual
Rev. 3.1
• If using a 2-mm combustor, use the flowmeter and the appropriate method
described under the pneumatics section of Chapter 4, “Installation” and set
the H
2
flow to 11.5 mL/min for the sulfur mode or 9.0 mL/min for the
phosphorus mode, Air 1 to 10 mL/min, and Air 2 to 10 mL/min. After
each setting, use the flowmeter to confirm that the cumulative flow rate
equals the sum of the individual set rates (e.g. in sulfur mode, H
2
flow rate
is 11.5 mL/min, the total of H
2
plus Air 1 is 21.5 mL/min, and the total of
H
2
, Air 1, and Air 2 is 35.5 mL/min). If the column gas flow into the PFPD
has already been set on the GC, then either the column gas flow should be
set to zero, or the amount of the column gas flow should be added to each
of the preceding initial flow rates.
• If using a 3 -mm combustor, use the flowmeter and the appropriate method
described under the pneumatics section of Chapter 4, “Installation” and set
the H
2
flow to 13 mL/min for the sulfur mode or 10.5 mL/min for the
phosphorus mode, Air 1 to 9.5 mL/min, and Air 2 to 10 mL/min. After
each setting, use the flowmeter to confirm that the cumulative flow rate
equals the sum of the individual set rates (e.g. in sulfur mode, H
2
flow rate
is 13 mL/min, the total of H
2
plus Air 1 is 22.5 mL/min, and the total of
H
2
, Air 1, and Air 2 is 36.5 mL/min). If the column gas flow into the PFPD
has already been set on the GC, then either the column gas flow should be
set to zero, or the amount of the column gas flow should be added to each
of the preceding initial flow rates.
• Replace the barbed fitting with the flame arrestor.
6. Turn on the power to the PFPD using the switch on the back panel of the
Detector Controller. The green ON LED on the front panel of the Detector
Controller will light up when when the power is in the ON position.
7. Using proper eye protection or a mirror, verify that the ignitor coil is glowing
orange by looking down through the flame arrestor in the ignitor cap. If it is
not glowing, increase the ignitor current unil the ignitor coil is pale red.
8. Open the valves regulating the flow of air and H
2
gas supply lines to the
PFPD’s pneumatic system.
9. The PFPD should begin pulsing after 10–30 seconds (the time required for
purging the associated gas lines). An initial sharp pop may be heard due to the
flame propagating out through the vent in the detector cap, especially if the
gas flows are turned on before the power to the PFPD is turned on. The pulses
should settle down to a steady rate.
10. If the PFPD does not begin pulsing or pulses erratically:
• Turn off the power supply at the back of the Detector Controller. (If
WinPulse has already been activated, an alternative measure is to set the
value in the Ignitor Current box on the Boards/Channel Parameters
screen to 0.0 and click on the Apply button.)
• Check gas connections for leaks and verify initial gas settings.
!
WARNING: To
avoid eye injury,
use proper eye
protection.
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