Labconco Precise Controlled Atmosphere and Basic Glove Boxes 5220131 - Manual (Page 37)

Chapter 6: Maintaining Your Glove Box
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Initial Certification
Each Precise Glove Box has been leak tested at the factory with helium gas at
positive 5" w.g. pressure; no leaks greater than 1 x 10
-4 cc/sec are allowable.
The glove box should be certified by your Safety Officer before use, with one
of the two tests listed below under Recertification. See Appendix G for
Labconco Helium Leak Test Method performed on all glove boxes at the
factory.
Recertification
Under normal operating conditions, the glove box should be recertified at the
time of installation and at least annually thereafter. The certifier should
choose and perform one of the following tests. Refer to Validating the Glove
Box in Chapter 3.
• Oxygen Method Leak Test per ISO 10648-2 test methods.
• Pressure Change Leak Test per ISO 10648-2 test methods.
Fluorescent Light Replacement
1. Disconnect the power. Refer to Appendix A for replacement parts.
2. Locate the light reflector on the top of the glove box behind the front
panel.
3. Remove the light reflector support by removing two hex nuts located
on both sides of the light reflector.
4. Remove the old fluorescent lamp.
5. Reinstall the new fluorescent lamp and light reflector by reversing the
steps above.
Pressure Relief Valve Replacement
1. Decontaminate the glove box interior, if required.
2. Wear appropriate protective equipment as determined by your Safety
Officer.
3. Turn the glove box and vacuum pump OFF.
4. Disconnect the exhaust connection, if installed.
5. Loosen the large nut that secures the pressure relief valve.
6. Remove the pressure relief valve from the glove box interior.