PROGRAMMING AREARAE-Gamma
4-13
2. This completes the single gas calibration procedure for one
sensor. The display shows the single gas calibration
submenu for a user to select another sensor or move to the
next submenu, Modify Span Gas Value.
3. Turn gas flow off. Disconnect calibration tube from monitor.
4. Repeat Step 1 through Step 3 to calibrate the next sensor.
5. Press [MODE] to stop the countdown timer and abort the
calibration during Step 1. If a sensor fails calibration, the
sensor name and the error message “failed, continue?” will
appear. Press [N/-] or [MODE] to abort calibration and
move to the next submenu item. Press [Y/+] to continue
single gas calibration. In either case, the current calibration
data will not be changed.
Oxygen Sensor Calibration
The oxygen sensor calibration is slightly different from the other
sensors. The oxygen sensor measures a range of 0 to 30% of
oxygen in the air. During fresh air calibration, the oxygen
sensor is calibrated to fixed 20.9% of oxygen. During single
sensor calibration, the user may supply a pure nitrogen gas so
the oxygen sensor may be calibrated to 0% oxygen. The user
may also supply other span concentrations of the oxygen, e.g.
19.5%, to calibrate the oxygen sensor. When “0% oxygen?”
appears, enter [Y/+] if the pure nitrogen gas is used to calibrate
the oxygen sensor. Otherwise, enter [N/-] to calibrate the
oxygen sensor to another span oxygen value. During either
single or multiple sensor calibration, the oxygen sensor will be
calibrated to the span value. (See Section 4.4.5 Modify Span
Gas Value)
NOTE:
After a 0% oxygen calibration, the user must perform a
fresh air calibration to ensure that the oxygen sensor is
calibrated correctly.
Calibration Time Stamp
When a single or multiple sensor calibration is performed, a
time stamp will be stored in the non-volatile memory. This
information will be included in the datalogging report.
