Labconco Protector Work Stations 3930021 - Manual (Page 52)

Chapter 6: Maintaining Your Enclosure
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5. To complete the CAL CONFIGURATION, be sure to enter “DONE”. If
needed, refer to the Configuration procedure provided on the following
page for additional details.
6. To start the calibration mode, enter “CALIBRATION” mode on the display
from the SETUP menu.
7. Follow the instructions on the display and simulate the low exhaust volume
by fully opening the sash. You may measure the average face velocity for
the low calibration set point or utilize the calculated value provided in the
chart above. The average face velocity for the low set point is accurately
measured by dividing the opening of the enclosure into equal area grids
consisting of at least 9 data collection points and measuring the velocity at
the center of each grid with a calibrated thermo anemometer. 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 simulate the high exhaust volume by fully closing the sash to its
normal operating position. Measure the average face velocity for the high
calibration set point to confirm that the source of constant air volume is
providing the desired face velocity for the enclosure. The average face
velocity for the high set point is accurately measured by dividing the
opening of the enclosure into equal area grids consisting of at least 3 data
collection points and measuring the velocity at the center of each grid with
a calibrated thermo anemometer. Enter the high value set point on the
display. The high value must be at least 10 fpm greater than the low value.
The high exhaust volume calibration will take about 5 seconds.
9. Be sure to enter “DONE” after successfully completing the low and high
calibration set points.
10. Once calibration is completed, go to “RUN” and hit “ENTER”. The value
should read close to the high calibration set point.
11. With the sash fully open, the Digital 1000 monitor should go into “RED
LED” low air alarm if successfully calibrated.