Baker SterilGARD SG303, Operator'S Manual

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When the light canopy is lowered, some electrical parts are exposed. Do not perform any work
inside the canopy unless you are a trained electrician or electronic technician.
5. Make adjustments to the blower speed controller and the damper as necessary. The speed controller is
located inside the light canopy. Turn the screw clockwise/counterclockwise to increase/decrease flow.
The damper is located on top of the cabinet. Slide the damper open/closed to increase/decrease flow. The
chart below may aid with making the correct adjustment:
Condition Adjustment
Downflow Inflow Damper Speed Controller
High High Decrease
Low Low Increase
Low High Close
High Low Open
OK Low Open Increase
OK High Close Decrease
Low OK Close Increase
High OK Open Decrease
NOTE: as the HEPA filters load up with particulates, airflow will be maintained automatically, at
least until the filter resistance increases 50% or more. When airflow eventually diminishes, you will
have to increase the blower speed in order to maintain the original volume of recirculating air. There
is a speed control located in the light canopy. Turn it clockwise until you have the desired airflow. If
the airflow cannot be maintained, it will be necessary to replace the
HEPA filters. (See “Replacing the
HEPA filters” later in this section).
Filter Leak Test
The filters in your cabinet were tested at our factory before shipment to ensure that the media, gasket, and
frame were not exceeding NSF International Standard 49 allowable leak rates. Since filters may become
damaged in transport, we recommend that the filters be re-tested by qualified technicians before the cabinet
is used. The filters should also be leak tested at prescribed intervals as specified by an industrial hygienist,
safety officer or other qualified person. NSF International details the steps for performing the filter leak test
in their Standard 49.
Filter leak test procedures:
1. Remove diffuser under downflow filter and external damper over the exhaust filter to access filter media
and frame.
2.
Perform calculations/measurements for upstream concentration of aerosol challenge.