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4 General test method
The most common way to use the Pack-Vac™ is the bubble emission test.
o Fill unit with enough water to submerge package when expanded. Water level will rise as pack-
age is expanded under vacuum.
o Place product to be tested in the chamber and close the lid.
o Compressed Air Model- Open ball valve on right side of tank to generate vacuum.
o Electric Model- Push red slide valve on top of tank in towards fitting, switch on vacuum pump.
o Adjust vacuum level with brass bleed off screw on side of base. Clockwise to increase, counter
clockwise to decrease.
o Increase vacuum until the package is expanded, see section 6. Bubbles will rise from a leak.
o Compressed Air Model- When testing is complete, close ball valve and vacuum will be re-
lieved.
o Electric Model- When testing is complete, switch off pump and slide red valve out to relieve
vacuum.
Note!
When testing a new package, always start with bleed screw at the lowest vacuum setting.
Slowly raise vacuum level to prevent sudden bursting, see section 6.
5 Alternative Testing Methods
5.1 Dry chamber testing
The unit can be used dry for simple burst strength and altitude testing. Also, a package containing liq-
uid with some headspace can be checked using the following method:
o Place the product on a paper towel in the dry chamber.
o Close lid and start the vacuum.
o Increase vacuum to fully expand package and put pressure on the seals.
o When finished, examine for leakage on the package or paper towel.
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