Labconco Logic+ A2, Technical Manual

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2. Take the downflow velocity reading at each test point location of the test grid.
3. Average all individual test point velocity readings.
4. If the average is not within the acceptance criteria range, adjust the biosafety
cabinet according to Adjusting the Blower Speed and/or Adjusting the Internal
Damper found in Section 9: Calibration .
Acceptance Criteria
Average downflow shall be as specified in Table 10-6
column “Downflow Average” +/-5
FPM (+/-0.03 m/s), and all individual test points /-16 FPM (+/-0.081 m/s) from
the average.
Type
A2 & B2
Cabinet
Width
Sash
Height
Downflow
Average
1
Test Grid
Distance
in inches (cm)
inches FPM (m/s)
Total Test
Points
Rows x
Columns
From Back
& Sides
Between
Rows
Between
Columns
3-foot
8, 9 55 (.28) 21 3 x 7 6.0 (15) 5.75 (14.6) 4.08 (10.4)
10 55 (.28) 21 3 x 7 6.0 (15) 5.55 (14.1) 4.08 (10.4)
4-foot
8, 9 55 (.28) 24 3 x 8 6.0 (15) 5.75 (14.6) 5.21 (13.2)
10 55 (.28) 24 3 x 8 6.0 (15) 5.55 (14.1) 5.21 (13.2)
12 60 (.30) 24 3 x 8 6.0 (15) 5.44 (13.8) 5.21 (13.2)
5-foot
8, 9 55 (.28) 30 3 x 10 6.0 (15) 5.75 (14.6) 5.39 (13.7)
10 55 (.28) 30 3 x 10 6.0 (15) 5.55 (14.1) 5.39 (13.7)
12 60 (.30) 30 3 x 10 6.0 (15) 5.44 (13.8) 5.39 (13.7)
6-foot
8, 9 55 (.28) 36 3 x 12 6.0 (15) 5.75 (14.6) 5.50 (14.0)
10 55 (.28) 36 3 x 12 6.0 (15) 5.55 (14.1) 5.50 (14.0)
12 60 (.30) 36 3 x 12 6.0 (15) 5.44 (13.8) 5.50 (14.0)
Type C1
Cabinet
Width
Sash
Height
Downflow
Average
1
Test Grid
Distance
in inches (cm)
inches FPM (m/s)
Total Test
Points
Rows x
Columns
From Back
& Sides
Between
Rows
Between
Columns
4-foot
8 65 (.33) 24 3 x 8 6.0 (15) 5.75 (14.6) 5.21 (13.2)
10 65 (.33) 24 3 x 8 6.0 (15) 5.55 (14.1) 5.21 (13.2)
6-foot
8 55 (.28) 36 3 x 12 6.0 (15) 5.75 (14.6) 5.50 (14.0)
10 55 (.28) 36 3 x 12 6.0 (15) 5.55 (14.1) 5.50 (14.0)
1. Tolerance for Average Downflow Velocity = +/- 5 FPM (+/- 0.03 m/s)
Table 10-6