Labconco XPert Filtered Balance Stations 3962622 User Manual

Page 43

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Chapter 6: Maintaining Your Filtered Enclosure

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39

5. Press the “ENTER” Keypad. The photometer will scan for 15 seconds, and

then the “0” keypad will flash. Press the “Enter” keypad. The unit will scan for
5 seconds, the display will read “0000,” and the unit will sound a confirming
tone.

6. Set the valve to “DOWNSTREAM.” Place the palm of your hand over the

sampling port of the pistol. There should be a strong vacuum at this port. If the
vacuum is weak, contact Air Techniques Hamilton Associates.

7. Turn the enclosure on and let it operate for a minimum of 5 minutes.

8. If necessary, adjust the speed control of the enclosure to maintain the following

airflows at 90 fpm; 2' (130cfm), 3' (200 cfm, 4' (265 cfm.), 5' (215 cfm), 6'
(260 cfm). The 5' and 6' uses two filters.

9. Position the aerosol generator discharge in the intake of the baffle inside the

enclosure.

10. Start the aerosol generator (Pressure to be +/- 1 psig). (10 psig). Ensure that

one Laskin nozzle is in the “open” position.

11. Allow the generator to operate for a minimum of 15 seconds. For all integral

motorized impeller models, scan the downstream exhaust side of the HEPA
filter by passing the sampling nozzle of the gun in slightly overlapping strokes
over the entire surface the filter, with the sampling port not more than 1 inch
from the surface of the filter media. Scan the entire periphery of the filter and
the gasket between the filter frame and the enclosure frame. Scanning shall be
done at a traverse rate of not more than 2 inches per second.

FOR THE XPERT FILTERED BALANCE STATION, PLACE THE
SAMPLING NOZZLE IN THE CENTER OF THE REMOTE
BLOWER EXHAUST.

Acceptance

Aerosol penetration shall not exceed 0.01 percent measured by the photometer.

Setting the Inflow Face Velocity with the Speed

Control Adjustment

XPert Filtered Balance System

1. Remove the front panel by loosening the (2) Phillips screws on top that

secure the front panel.

2. The speed control is located on the electrical subassembly located behind

the switched control panel and below the front panel. See Figure 6-1.

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