Labconco Protector Work Stations 3930021 - Manual (Page 50)

Chapter 6: Maintaining Your Enclosure
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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.