PureAire Monitoring Systems, Inc.
39
6.2 Sensor Verification Procedure
CAUTION:
Be sure to observe all safety guidelines when generating and using
nitrogen.
Under ambient non-oxygen deficient environments,
Air Check
O
2
monitor will
indicate a display reading of 20.9%. As the sensor ages, the reading may decrease
in value. The following procedure should be used to adjust the reading to 20.9%.
1)
Insure that the
Air Check
O
2
monitor is in a clean non-oxygen deficient
environment.
2)
Enter the password.
Refer to Section 5.3
3) Select the
Sensor Adjust
menu.
This menu will permit fine-tuning of the oxygen readout to a known concentration of
Oxygen. It is recommended to adjust the oxygen display to ambient oxygen levels of
20.9%. To access this menu push the joystick down to display the
Sensor Adjustment
menu. This will scroll on the digital display.
NOTE
:
It is recommended to warm up the Air Check Oxygen monitor
for two hours before making any adjustments to the sensor.
Push the joystick right to access the first sub menu;
Set Sensor Span
will scroll on the
display. This is the menu that will permit fine adjustment of the ambient oxygen
reading to 20.9%.
Push the joystick right to access the first sub menu;
Set Sensor Span
will scroll on the
display. This is the menu that will permit fine adjustment of the ambient oxygen
reading to 20.9%.
Push the joystick right to access the sensor span. The display will indicate a value
between 0 and 255 counts. Pushing the joystick up increases the counts and decreases
the percent oxygen value displayed on the Air Check. Pushing the joystick down
decreases the counts and increases the oxygen value displayed on the Air Check. As the
counts increase and decrease the percent oxygen displayed will also increase and
decrease. Adjust the digital display until 20.9% + / - 0.2% is displayed.
..Sensor Adjustment…
20.9%
..Set Sensor Span..
20.9%
