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See Figure 4-1 15. Fluorescent Lamp is located above the work area, out of contact with contaminated air. A safety glass window beneath the lamp distributes the light evenly across the work surface. See Figure 4-1. 16. Filter System Pressure Gauge indicates the total system pressure across the HEPA filter and pressurized plenum to help predict HEPA filter loading. See Figure 4-1. 17. Filter Clamping Bolt evenly seals the HEPA filter to the frame of the enclosure. See Figure 4-1 and 4-2. 18. Sash. The sash is constructed of 1/4 inch tempered safety glass. It pivots up for loading and cleaning. See Figure 4-1 19. Control Panel. The control panel, which is located above the sash, contains the filter system pressure gauge, control switches and the electronics. See Figure 4-1. 29 Chapter 4: High Performance Features and Safety 20. HEPA (High Efficiency Particulate Air) Filter is rated to remove 99.99% of all particles 0.3 micron in size. See Figure 4-2. 21. Lamp Ballast (Not Shown) for the fluorescent lamp is located behind the control panel. 22. Accessory Work Surface (not shown) is dished and contoured to fit the dimensions of the enclosures to contain spills. 23. XPert Filtered Balance Station Exhaust Collar (Not shown) provides a 6" diameter transition to a remote blower or house exhaust system. See figure 3-2 in Chapter 3. 24. Accessory Odor Control Carbon Filters are available for nuisance odor control. Accessory carbon filters are designed to remove trace amounts of noxious fumes; capacity is not adequate to remove continuous fume generation. The carbon filters are supported above the HEPA filter and the gasket side is down and compressed by the weight of the carbon filter. Carbon filters are listed in Chapter 7. See Figure 4-2. 25. Accessory Exhaust Connection Kits are available to duct integral blower models including the XPert Filtered Balance System to the outside. The exhaust connection allows the operator additional protection from hazardous fumes or vapors and should be used if the carbon filter capacity is not adequate. Each kit includes an epoxy- coated steel exhaust transition adapter with manual adjustable damper designed for 6" diameter PVC duct. See Figure 3-3 in Chapter 3. 26. Upper Diffuser Screen provides protection for the HEPA Filter and (LED) airflow sensor. See Figure 4-1 and 4-2. 27. HEPA Filter Access Port to access HEPA filter during filter changing procedures. For harmful powders and particulates, the true bag-in/bag-out procedure is used to properly dispose of the contaminated HEPA filter. See Figure 4-2. 28. Utility Shelves (not shown) allow the user to hold utensils and printers on shelves inside the enclosure. See Chapter 7. Chapter 4: High Performance Features and Safety Safety Precautions 1. Although the enclosure has been engineered to ma...

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