INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 75)

68 ISP-074-575-P1D 68
Figure 23.
Gas Bag
Adapter
3. Loosen the knurled nut on the reducing union of the gas bag adapter.
NOTE: Do not remove the nut from the union, as the Teflon ferrules contained inside the nut
may be lost.
4. 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.
NOTE: Over-tightening the Teflon ferrules will result in damage to the ferrules!
5. 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.
6. Flush and fill the gas bag. Remove the knurled nut on the adapter tube
from the regulator.
8. Repeat this procedure, if necessary, to prepare a bag of zero air.
NOTE: Do not use the same gas for the bag of zero air. You will contaminate the bag of
zero air.
Using the Gas Bag
To fill gas bag:
1. Turn the knurled plastic knob counter clockwise to unlock it. Use the
knurled collar on the valve tube to gently push the valve tube down,
toward the bag.
2. Turn the knurled plastic knob clockwise to lock the valve tube in place.
3. 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.
4. Open the syringe port and empty the bag. Flush the bag a few times
with the calibration gas and then fill it.
1/8" to 3/16"
Union
1/8" Nut
Insert Gas
Bag Tube Stub
1/8" Adapter
Tubing
To Regulator
or 2020
Teflon
Ferrules
Front
Back
To Regulator
or the
2020PRO