Labconco Protector Controlled Atmosphere Glove Box - Manual (Page 25)

Chapter 3: Getting Started
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Figure 3-8
Rear View of Glove Box with manual control valves and the
plumbing connections
Validating the Glove Box
Each Protector Glove Box has been helium leak tested at the factory for
integrity and found to have no leaks greater than 1 x 10
-6 cc/sec while at a
positive pressure of 5 inches helium. Refer to Chapter 6, Initial Certification
and Appendix G for Helium Leak Test Method.
Overall Glove Box Main Chamber Leak Test
The Protector Controlled Atmosphere Glove Box has been tested with an
oxygen monitor detecting oxygen levels as low as 0.1 ppm; the rate of increase
in oxygen over time was determined in accordance with the ISO 10648-2
oxygen leak decay test method. The results validate that the Protector
Controlled Atmosphere Glove Box meets Class 1 conditions for controlled
atmosphere chambers. Figure 3-9 and 3-10 show test results of the oxygen
permeation or oxygen level increase as a function of time. Per ISO
specifications, Class 1 controlled atmosphere chambers have a specified hourly
leak rate of less than 5 x 10
-4 (< 1.67 ppm/min) per Table 3-1 listed at the end
of Chapter 3 with performance results summarized in Chapter 1.