Labconco Protector 3930000 User Manual page 41

Speed Control Used on Integral Blower Protector Work Station
Guardian™ 500 Airflow Monitor Kit No.
3944700 or 3944701
The Guardian 500 Airflow Monitor is designed to continuously monitor
airflow through enclosures and fume hoods. This permanently installed
device provides both visual and audible alarms to alert the user of abnormal
airflow conditions. A green light on the front of the monitor indicates normal
flow conditions. When flow conditions lower than the set point are
encountered, a flashing red light is activated along with an audible alarm.
To temporarily mute the audible alarm, press and release the test/reset
button. The Guardian 500 Airflow Monitor has a built-in sensor, 3 relay
inputs and 1 relay output. The relay inputs can be configured for night
setback, external alarm, and sash high alarm. The night setback features
disables the alarm. The relay output is configured for Low Air Alarm.
Product Service 1-800-522-7658
Chapter 6: Maintaining Your Enclosure
Exhausts to the Room
Speed Control Adjusted
Slowly with Small Phillips
Screwdriver (CCW to
Increase or CW to Decrease)
Figure 6-1
37