INFICON MicroFID II Portable Flame Ionization Detector - Manual (Page 62)

074-579-P1A 62
4. Loosen the knurled nut on the reducing union of the bag adapter.
NOTE: Do not remove the nut from the union, as the Teflon ferrules contained inside the nut
may be lost.
5. Insert the tube stub from the gas bag into the knurled nut. Tighten the knurled nut and ensure
the tube stub is secure. If the gas bag is not secure, ensure you have inserted the tube stub far
enough into the knurled nut. Do not over tighten the fitting.
WARNING
Over-tightening the Teflon ferrules will result in damage to the ferrules.
6. The union should be connected to the gas bag adapter. If it is not, then tighten the nut on the
adapter tube to the union.
7. Open the gas bag valve. Turn the knurled plastic knob counter clockwise to loosen it, then
use the knurled collar on the valve tube to gently push the valve tube toward the bag.
Figure 33. Using the Gas Bag
8. Turn the regulator knob counter clockwise about half a turn to start the flow of gas. Fill the
gas bag about half full and then close the regulator.
Locking Ring
Tube Stub
Gas Bag Valve Injection Port
Septum Retainer
Replacing the Septum
Remove retainer and
replace silicone septum.
Place septum with
Teflon side down. Replace retainer
Do not overtighten.
Overtightening may result
in needle blocakge
Replace septum after
5-10 injections.To replace
septum, turn retainer counter-
clockwise. For replacement
septa order Teflon bonded to
Silcone, diameter = .375" (9.5 mm)