Title: Coupons Effective Date: 7-15-93

1

Purpose

1.1 To establish a standard procedure to determine the following:

a) Airflow along the entire perimeter of the work access opening is inward

b) Airflow within the work area is downward with no dead spots or refluxing

c) Ambient air does not pass on or over the work surface

d) Air does not reflux to the outside at the window wiper gasket and side seals.

2 Scope

2.1 This procedure applies to Class II Biohazard Cabinets.

3 Reference

3.1 NSF Standard 49, 2002.

4 Definition

4.1 None

5 Responsibility

5.1 Test and Balance (TAB) technicians shall record test results, Pass or Fail, on Form FN 8.057.1 (Biohazard Safety Cabinet Test Report Summary Sheet).

5.2 All test reports shall be saved in files, located in the TAB department of Therma.

5.3 All test equipment utilized shall be in calibration in accordance with National Environmental Balancing Bureau (NEBB) Standards and traceable to the National Institute of Standards and Technology (NIST).

6 Materials Requirement

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF THERMA CORPORATION. ALL INFORMATION SHALL (A) BE RETAINED IN CONFIDENCE; (B) NOT BE REPRODUCED IN WHOLE OR IN PART; AND (C) NOT BE USED OR INCORPORATED IN ANY PRODUCT EXCEPT UNDER EXPRESSED WRITTEN AGREEMENT WITH THERMA CORPORATION.

6.1 DI water

7

Test Equipment

7.1 A source of visible cold smoke.

8

Procedures

8.1 Generate visible, cold smoke.

8.2 Refer to NSF 49, Annex F, Section F.4, Subsection F.4.3 for procedures and Subsection F.4.4 for standards of acceptance.

8.3 Indicate Pass or Fail for each smoke test in the appropriate check box on the Form FN 8.057.1 (Biological Safety Cabinet Test Report Summary Sheet).

9

Review and Approval

9.1 TAB technicians shall return the Form FN 8.057.1 (Biohazard Cabinet Report Summary Sheet) to the TAB Department for review.

Document Approval

Test and Balance Supervisor

Engineering Manager

Date

Quality Assurance Manager

11-15-03

Date