Labconco 3940200 User Manual page 76

PROBLEM
Airflow Monitor
Malfunction
(Continued)
CAUSE CORRECTIVE ACTION
Wrong alarm set Airflow monitor was not properly
point. adjusted. Repeat calibration steps
outlined in this manual in Chapter 6
or in the supplied Digital 1000
Monitor Manual.
Constant audible Check airflow and calibration of
alarm. airflow monitor. See Chapter 6.
Continuous alarm. Check the face velocity of the
enclosure as the airflow of the
system may have changed. If
incorrect, adjust the speed control to
increase face velocity. The HEPA
filter may have become loaded. If
face velocity is correct, calibrate the
airflow monitor outlined in this
manual in Chapter 6.
Monitor alarms; air Lightly clean the airway with clean
way to airflow air. Be careful not to touch sensitive
monitor sensor is electrical components.
blocked by insects,
dust or debris.
Audible disable An alarm condition must be
will not stay continuously present before the
operational. audible alarm can be silenced. If
flow conditions fluctuate near the
alarm set point, the airflow monitor
will automatically reset it. Action
should be taken to bring the
enclosure airflow into proper
operating parameters or adjust the
alarm set point lower.
Chapter 8: Troubleshooting
71