Hepa Filter Leak Test; Filters That Can Be Accessed And Scanned - Thermo Scientific 1500 A2 Series Operating Manual

Section 8
Certification Testing
Testing Information
(continued)
33 points

HEPA Filter Leak Test

Filters that can be
Accessed and Scanned
8-8 1500 Series A2
21 points
6 5.88
• 6 ft Models 1589,1579
6 5.88 5.88 5.88 5.88
Calculation:
• Average Downflow Velocity = Sum of all measurements / Number of
readings
Acceptance:
• 58-68 FPM
Description:
• Determines the integrity of the downflow and exhaust filters.
Equipment:
• Aerosol Photometer, or equivalent
• Aerosol Generator, or equivalent
Method:
1. Allow the cabinet to operate for approximately 20 minutes.
2. Remove the work tray and protective covers, as appropriate.
3. Introduce the aerosol from the generator in the center rear of the work
area, using a tee fitting to evenly distribute the aerosol.
5.88 5.88 5.88 5.88
5.88 5.88 5.88 5.88
6
5.5
5.5
6
5.88 6 inches
6
5.5
5.5
6
5.88 5.88 6 inches
Thermo Scientific
5.7 for
8 in
opening
models
5.7 for
8 in
opening
models