Labconco Protector 3944300 User Manual page 28

Chapter 6: Maintaining Your Protector Demonstration Hood
Annually
 Have the hood validated by a qualified certification technician. See
Validating the Hood in Chapter 3.
 All monthly activities.
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.
Guardian 500 Component Identification
See Figure 6-1 on the following page.
1. Air Inlet
2. Normal Flow
Indicator
3. Alarm Indicator
4. Mute Button
5. Adjustment for Alarm
Set Point
24
A portion of the air coming into the enclosure
passes through the air inlet and across the flow
sensors.
This green light indicates normal flow conditions.
This red light is activated approximately 10-30
seconds after the low flow set point is reached.
Low flow set points are 10-20 fpm below normal
flow.
If no alarm is present, this button will cause the
red lamp to light and the audible alarm to sound.
If an alarm is present, the button will silence the
audible alarm.
This potentiometer is used to set the low flow
indicators for the alarm. It is adjusted with a
small screwdriver.
Product Service 1-800-522-7658