(2) The protective entrance provides a
adjusts the airflow valve and silencer
pressurized transition area between the
assembly to maintain the proper air
shelter and the outside contaminated
pressure inside the protective entrance.
zone. Personnel entering from the outside
must wait 5 minutes within the protective
d. CPE System Configurations .
entrance before entering the shelter.
protection equipment is configured to fit the needs of a
specific application and may differ from the typical
The protective entrance
system discussed above.
control module (PECM) automatically
TYPICAL CPE CONFIGURATION