12
12
NOTE:
If an error message is displayed at this point, there is problem
with the calibration and the procedure will be terminated. See
Calibration Error Codes below.
8. Move the sash to the 12 inch (305 mm) open position (the point
where the high flow face velocity traverse was conducted).
9. Use the Up/Down buttons to adjust the displayed Hi value to
match the actual measured high face velocity (sash at 12 inch/204
mm open position).
10. Press the Test/Reset button once the desired value is displayed and
step away from the face of the fume hood. The monitor will count
down 5 seconds (shown on the display) and then take readings for
20 seconds (again shown as a countdown display).
11. The monitor now conducts a self-test to determine if the
calibration was successful. If this test indicates that the calibration
was successful, the instrument will emit two quick beeps, store the
new values in memory, and return the display to the CAL
configuration menu selection.
This completes the calibration procedure. To view other parameter
configuration menu selections (see Section 5), press the Up/Down
buttons. To exit and return to the Run mode, press and hold the
Test/Reset button for two seconds.
Calibration Error Codes
If an error occurs during a calibration step, the instrument will emit one
long beep and the display will show an error code.
Error Code
Cause
ErL
Airflow below the instrument’s measurement range.
ErH
Airflow above the instrument’s measurement range.
Err
Too much variation in airflow.
Er2
Insufficient difference between the low and high calibration
points.
