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AQUATRAN Model 3/40 Operator's Manual
If your sample is thin (less than 5 mils), you need only mask one side. Mount the sample in the test cell with
the film side facing up.
If your sample is thicker than 5 mils, mask both sides. Be sure the mask apertures are accurately aligned
and the edges around the foil aperture are tight against the film.
Orienting the Sample
When mounting test samples, orientation can be important. Edge leakage or oxidation on some materials
can affect the test result. It is important to place the "barrier side towards the carrier". Follow the guidelines
below to minimize edge leakage and oxidation effects.
Homogeneous Materials
If you are testing a homogeneous, one-layer sample, the orientation of the sample in the cell
is not critical.
Multi-Layered and Laminated Materials
Install a multilayered film or laminate with the barrier coating or laminate up, toward the top of
the cell. For example, a one-sided, PVDC-coated paper should be mounted with the PVDC
side up, placing the PVDC towards the carrier gas.
Metalized Materials
Insert the film into the test cell with the metalized side towards the carrier gas to prevent
oxidation.
Mounting a Sample in a Film Cartridge
Follow the instructions below to mount a film sample in the Test Cell:
Note: For information on cutting and preparing the film samples refer to the sections on "Sample Size",
"Using Masks" and "Orienting the Sample" in this chapter.
Note: For an illustration of how a film mounts on the cartridge surface refer to Figure 7-1.
1.
Remove the Test Cartridge from the instrument. See Loading and Unloading a Test
Cartridge" on page 3-8
2.
Remove the four screws securing the two parts of the Test Cartridge.
3.
Separate the top part from bottom part of the cartridge and remove the old film sample.
4.
Clean the film sealing surfaces of the cell to remove the old grease.
5.
Apply new grease to the sealing surfaces.
6.
Inspect the TruSeal flushing ring and ports, remove any excess grease.
7.
Place the film on the greased sealing surface, remove any wrinkles as necessary.
MOCON, Inc.
Revision D
Testing Flat Film Samples
7-3
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