Labconco Protector Filtered Glove Box - Manual (Page 24)

Chapter 3: Getting Started
Product Service 1-800-522-7658 20
Summary of Performance Testing Results
Labconco’s test results show that the Protector Filtered Glove Box meets all
the performance criteria when operated at 50% airflow volumes (50% inflow
corresponds to 42 CFM or less for weighing with an analytical balance or
handling powders; and 35-42 CFM or above for safe air clean up). In cases
where insufficient performance was observed, the lack of performance
occurred under adverse test conditions or at airflow volumes below minimum
recommended airflow volume for the specific operation. Contact Labconco
or visit
www.labconco.com for complete performance test data. The
following provides a brief summary of the findings:
• Smoke purge tests were conducted at airflow volumes of 15-CFM to
84-CFM. The time required to visibly purge the main chamber of smoke
varied from approximately 360 seconds at 15-CFM to 60 seconds at
84-CFM.
• Tracer gas was not detected in the breathing zone of the mannequin
during tracer gas containment tests with the glove box vented to the
outside. Perimeter scans were also conducted during tracer gas testing of
the Protector Filtered Glove Box, and under normal laboratory conditions
testing surpassed ASHRAE 110 standards (0.10 PPM average or less)
and achieved Labconco standards (0.05 PPM average or less).
• Surrogate naproxen sodium test results were conducted with three different
operators of varied skill level and stature. Each operator weighed 20, one
gram samples over a period of 30 minutes or greater. In each case, the
operator cleaned up after weighing and no detectable levels of naproxen
sodium occurred at the operator, transfer chamber, or in the room.
Detection limits were less than 2 ng/cassette or less than 20 ng/cu. meter.
The Protector Filtered Glove Box clearly showed excellent repeatability
and containment of naproxen sodium powder during typical weighing
operations. Test results validated by Safebridge Consultants, Inc.
• Noise Pressure (Sound levels) varied from 51.8 dB(A) at 15-CFM to 68.5
dB(A) at 84 CFM. These sound levels will be much less if the exhaust air
from the glove box is ducted to the outside.
• Airborne particulates (measured under positive and negative pressure)
within the main chamber of the glove box exceeded ISO Class 5
conditions (equivalent to Class 100) and achieved ISO Class 3 conditions
(equivalent to Class 1).
• Glove box fluorescent lamp light levels (illumination) measured across
the work surface averaged above 80 foot candles for stainless steel
models and above 120 foot candles for fiberglass models.