Labconco Protector Demonstration Hoods 3945021 - Manual (Page 36)

Chapter 6: Maintaining Your Protector Demonstration Hood
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Guardian Digital 1000 Calibration
1. Calibrate the airflow monitor according to the instruction manual that
comes with the kit. To successfully calibrate, it will be necessary to
change the face velocity by adjusting the airflow exhaust volume. The
exhaust volume can be adjusted with the speed control on the FilterMate
or by using an adjustable damper on the exhaust blower. Typical
calibration conditions are set at face velocity air sample differences of at
least 20 feet per minute. The airflow monitor is factory set to be
calibrated with a difference of at least 50 fpm and can be changed by
changing the “lower/higher air sample difference”. The following
suggested in flow face velocity speeds are recommended to successfully
calibrate. Typical low air alarms are set 10-20 fpm below operational
speeds. Follow Step 2 below and review the Labconco 1000 Alarm
User’s Manual that comes with the airflow monitor.
Low Air
Alarm
Set Point
Enclosure
Operating In
flow Speed
Low
Calibration
Set Point
High
Calibration
Set Point
40 - 50 fpm 60 fpm 40 - 60 fpm 100 – 120 fpm
60 - 70 fpm 80 fpm 50 - 90 fpm 100 – 150 fpm
80 – 90 fpm 100 fpm 50 – 110 fpm 100 – 170 fpm
2. Go to setup and then CAL CONFIG MENU and change the
“lower/higher air sample difference” to 20 fpm. This will allow you
to successfully calibrate with values of a minimum of 20 fpm
difference.
3. While in CAL CONFIG MENU, change the “sensor difference” from
10% to 3%.
4. While in CAL CONFIG MENU, adjust the red low air alarm to the
desired setting such as 55 fpm. Then adjust the yellow “CAUTION
or WARNING” to 59 fpm. Then adjust the “CAUTION or
WARNING” air reset to 3 fpm. This sets the alarm condition.
5. To complete the CAL CONFIGURATION, be sure to enter “DONE”.
6. To start the calibration mode, use the Labconco 1000 Manual and
enter “CALIBRATION” mode on the display from the SETUP menu.
7. Follow the instructions on the display and alter the low exhaust
volume with the speed control on the FilterMate or exhaust damper.
Measure the average face velocity and enter the low value on the
display. Be careful not to block the opening. The low exhaust
volume calibration will take about 5 seconds.
8. Now alter the high exhaust volume with the speed control on the
FilterMate or exhaust damper. Measure the average face velocity and
enter the high value on the display. The high value must be at least
20 fpm greater than the low value. The high exhaust volume
calibration will take about 5 seconds.