Baker SterilGARD SG404, Service Manual, Page: 25 / 94

389D001 Rev G 25 of 94
Airflow Smoke Pattern Test
WARNING!
THIS TEST REQUIRES THE USE OF A SMOKE TUBE OR SIMILAR DEVICE WHICH MAY
SET OFF LABORATORY SMOKE DETECTORS IF USED CARELESSLY.
SPECIAL PRECAUTIONS SHOULD BE TAKEN TO AVOID AN ACCIDENTAL FIRE
ALARM CONDITION.
1. Down flow test: Smoke shall be passed from one end of the cabinet to the other, along the centerline
of the worksurface, at a height of 4 inches (100mm) above the access opening height. The smoke
shall show smooth downward flow with no dead spots or reflux (upward flow).
2. View screen retention test: Smoke shall be passed from one end of the cabinet to the other, 1 inch
(25.4mm) behind the view screen, at a height 6.0 inches (152mm) above the access opening height.
The smoke shall show smooth downward flow with no dead spots or reflux. No smoke shall
escape from the cabinet.
3. Work opening edge retention test: Smoke shall be passed along the entire perimeter of the work
opening edges, approximately 1.5 inches (38mm) outside the cabinet. Particular attention should be
paid to corners and vertical edges.
No smoke shall be refluxed out of the cabinet once drawn in,
nor shall smoke billow over on to the work surface or penetrate onto it.
4. Sash/window seal test: Smoke shall be passed up the inside of the sash 2 in (51mm) from the sides
and along the top of the work area. There shall be no escape of smoke from the cabinet.