68
Type C1 Supply HEPA Filter Leak Test
During this test the supply HEPA filter will be challenged and scanned to check for
leaks. This section describes how to access and test the supply HEPA filter on a Type
C1 biosafety cabinet. The aerosol generator and photometer should be prepared at this
point as described in the preparation steps listed in the previous section.
1. Raise the glass sash as high as it will go.
2. Using a 7/16 inch nut driver or socket and ratchet, remove the two acorn nuts
along the front of the diffuser. See Figure 10-18. Note: Dress Panel and LED
lamps removed for clarity.
3. Lower the front edge of the diffuser until it clears the bottom of the sash, then pull
the diffuser straight out of the biosafety cabinet. See Figure 10-19.
4. The supply HEPA filter is now ready to be scanned. Set the photometer sampling
valve to “DOWNSTREAM”. Ensure proper vacuum at the sampling nozzle.
Figure 10-18
Acorn Nuts (2)
Note:
The diffuser acorn nuts
are secured to the studs with a
removable thread locking
compound to prevent them from
vibrating loose during shipment.
There may be some resistance
the first time the nuts are
removed; this is normal. No
additional thread locking
compound need be applied to
these acorn nuts unless the unit
is being prepared for shipment.
Figure 10-19
Diffuser
HEPA Filter
Summary of Contents for Logic+ A2
Page 149: ...149 208 240V...
Page 151: ...151 Blower only will not start...
Page 152: ...152 Lights only will not illuminate...
Page 153: ...153 UV Light will not illuminate...
Page 154: ...154 Airflow Alert activating...
Page 155: ...155 Filter Life Gauge not at 100 when new...
Page 156: ...156 Contamination in the work area...
Page 200: ...200 Figure 23 4 1 2 4 3 5 7 6 8 8...
Page 201: ...201 END OF 3849920 Figure 23 5 9 10 11 12 13...
