Labconco Protector Filtered Glove Box - Manual (Page 23)

Chapter 3: Getting Started
Product Service 1-800-522-7658 19
Setting the Exhaust Volume with the Speed
Control Adjustment
For Protector Filtered Glove Boxes, the speed control located on the front
panel of the transfer chamber adjusts the exhaust air volume. The exhaust air
volume should be adjusted to the lower settings for weigh operations.
(Consult your Safety Officer for airflow recommendations for your
application). Working at the lowest exhaust volume appropriate for the
application will give the quietest operation. To increase the dilution rate of
air volume changes after working in the glove box and to ensure proper
cleaning, the speed control should be maintained at a higher setting above 35-
40 CFM for 5 to 10 minutes as recommended by the operator’s
predetermined protocol. The exhaust volume is increased by turning the
speed control counterclockwise.
Resetting the Calibration Program
With the gloves installed and transfer chamber doors closed, the maximum
airflow volume (CFM) for the glove box has been preset between 50–85
CFM with a main chamber maximum pressure above 0.7" water gauge.
Important Note: Transport, altitude and temperature differences may require
a reset of the “Calibration Program” as outlined in Chapter 5. When
“Calibration” is reset, it is best to try the previously calibrated values shown
in “Diagnostics” as outlined in Chapter 5 and the test report form that shipped
with the glove box.
Validating the Glove Box
The Protector Filtered Glove Box has been leak tested at the factory for filter
and main chamber pressure integrity. The HEPA or ULPA filters should be
leak checked upon start-up and annually thereafter per the procedure in
Chapter 6. Upon start up, the main chamber pressure should be greater
than 0.7" w.g. at full blower speed to validate proper blower operation;
if not, contact Labconco for service.
NOTE: Main chamber pressure and smoke removal tests
should be performed frequently, per your established
quality system, to ensure safe performance.
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