Labconco Protector Work Stations 3930021 - Manual (Page 28)

Chapter 4: High Performance Features & Safety Precautions
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3. Upper Dilution Air Supply provides bypass air from above the work area.
This feature constantly bathes the inside of the sash with clean air and
reduces chemical concentrations along the sash plane, near the critical
breathing zone. Five to seven percent of the required air volume is
introduced through the upper dilution air supply. The upper dilution air
supply also reduces stagnant pockets of air in the upper interior. See
Figures 4-1 and 4-2.
4. Stainless Steel Zoned Rear Perforated Baffle directs horizontal laminar
air streams to the three-zoned sections of the perforated baffle. The three-
zoned sections have increasingly more open area at the bottom that help
form laminar airflow. This minimizes the potential for air to roll forward
preventing contaminants from moving toward the sash opening. The
majority of contaminants are highly diluted, captured and removed on the
first pass through the enclosure. See Figures 4-1 and 4-2.
5. Side-Entry Air Foils allow turbulence-free air to enter the enclosure from
the sides and allow clean air to sweep the interior walls of the enclosure.
See Figures 4-1 and 4-2.
6. Ergonomic Slope of 20 degrees provides maximum visibility and comfort,
reduces glare thereby minimizing operator fatigue. See Figures 4-1 and 4-2.
7. Internal Work Space provides necessary depth to perform work inside the
Protector Work Station without it extending outside the enclosure or resting
on the lower air foil. Remote blower model provides 23" working depth
and integral blower model provides 17.19" working depth. See Figures 4-1
and 4-2.
8. Safety Glass Sash with Spring-Loaded Latch has a wiping seal for
maximum containment and features a spring-loaded latch to secure sash
open for loading and cleaning. The sash must be down for normal
operation. See Figures 4-1 and 4-2.
9. Utility Ports with Iris (Work Station for Remote Exhaust Only) allows
electrical cords and data cords to pass through the back of enclosure without
leaving a large hole for contaminants to escape. The enclosure ships with
both solid plugs and iris plugs. See Figure 4-1.
10. Accessory Guardian™ 500 Airflow Monitor or Guardian™ 1000
Digital Airflow Monitor continuously monitors airflow. An audio/visual
alarm alerts the user to low airflow conditions on both the Guardian 500 and
Guardian 1000 Digital airflow monitors. The Guardian™ 1000 Digital
Airflow Monitor also displays a face velocity value, provides an RS232
output, a night setback mode and several auxiliary relay ports. Both airflow
monitors are available options on all Protector Work Station models. See
Figure 4-1 and 4-2. See Chapter 6 for complete details, installation and
calibration.
11. Built-In Motorized Impeller (Integral Blower Models Only) eliminates
the need for a remote blower when using low level concentrations of
chemicals. The impeller wheel is dynamically balanced. See Figure 4-2.