Labconco Cell Logic A2 User Manual page 14

The exhaust system must be capable of moving the following volumes of exhaust air at
the negative pressures listed. The Airflow Volumes are the values recorded via direct
measurement using a flow hood on the exhaust duct above the cabinet. The
Concurrent Balance Values are measured in the exhaust duct via traverse
methodology, and will always be higher due to differences in volume measurement
methodologies.
Cell Logic Type A2
Model
3-foot, 9" Sash
4-foot, 9" Sash
5-foot, 9" Sash
6-foot, 9" Sash
1: Unlike Type B biosafety cabinets, the recommended vacuum will remain constant throughout the life of
the exhaust HEPA filter. The Duct Vacuum reading was taken in the center of the duct diameter, half way
up the BSC Duct Stub (reference Figure 2-6). Duct vacuums above 0.5 inches H
in erratic operation and throw an alarm condition from the product.
2: WC = Inches of Water Column, typically expressed in units of inches H
If Night-Smart is enabled, the exhaust system can be lowered to the approximate
volumes listed in Table 2-2 when the sash is closed.
Cell Logic Type A2
Airflow Volume
3
ft /min
270
385
478
635
Model
ft
3-foot
4-foot
5-foot
6-foot
Concurrent
Balance Value
3
m 3 /hr ft /min
459 297
654 424
811 525
1079 699
Approximate
Airflow Volume
3 3
/min m /hr
75 127
180 306
200 340
320 544
14
Table 2-1
Recommended
Duct Vacuum
2
m 3 /hr WC
505 0.04
720 0.11
892 0.16
1187 0.23
O (125 Pa) may result
2
O.
2
Table 2-2
Recommended
Duct Vacuum
Pa
WC
0.02 5
0.02 5
0.06 16
0.10 24
1
Pa
10
26
39
57