Model S684-3 Three-Cell Automated Water Vapour Diffusion Apparatus - cont'd 3

Cell Features

• specimen position (air gap) on the wet side can be adjusted anywhere in the test gap from right up against the wet membrane to right up against the specimen from outside the cell and without opening it.
• air gap on the dry side of the specimen can be adjusted with the use of spacers provided from zero to ten milimeters in increments of one milimeter.
• the cell can be used for making absolute measurements of the water vapour diffusion of a wide range of textile materials including those that have microporous or hydrophilic laminations or coatings.
• the moisture mass flow measurement can be made using a weight measurement method (by computor) or a volume measurement method (by hand).
• measurements are made without opening the cell. This means no disturbance of the atmosphere in the cell during a test leading to more reliable results.
• Dry air flow is horizontal across the dry side cavity.
• The model 643 cell, that has a radial air flow, can be readily substituted for use in the automated system.

Accessories

The following accessories are needed to run the system:

• A PC running Windows XP Professional.

• Electrical power at 110 VAC.

• An air flow of 240 to 600 liters per hour (4 to 10 lpm) per cell.

Air can be supplied by a piped-in laboratory air system, air bottle/s or an air pump. The apparatus has an in-line inlet regulator that can take a 300 psig supply through a 1/8” NPT female port or a 1/4” hose barb fitting.

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