13
CALIBRATION MENU
GAS VALUES
SPAN CAL
HISTORY
O
2
ZERO CAL
FRESH
AIR
REMINDER
EXIT
3. Use the navigation arrows to highlight
O
2
ZERO CAL and press the MODE
button.
Do O
2
Zero Calibration
YES
NO
4. Press the MODE button with YES
highlighted to begin the O
2
zero
calibration.
The dilution pump will be temporarily
disabled for the initial phase of this
calibration.
Apply a gas mixture
Containing no oxygen
5. If using a calibration balloon, fill the
calibration balloon nearly full with
calibration gas containing no oxygen
and connect the balloon to the inlet
coupling on the front of the
Cannonball 3. Continue to allow gas
from the calibration cylinder to fill the
balloon while calibrating. If using a
demand flow regulator, flow gas to
the sensors.
O
2
Sensor Reading 20.9
Press MODE to calibrate
6. The oxygen reading will drop
immediately and should approach a
reading of 0.0. The sensor should
stabilize in approximately 2 minutes.
Press the MODE button once the
oxygen reading stabilizes to calibrate
the sensor.
O
2
Sensor Reading 0.0
Calibrating……
↓
O
2
Zero Calibration
Completed
At this point the Cannonball 3 will
automatically re-enable the dilution pump
for the second part of the O
2
zero
calibration.
If using a calibration balloon, continue to
flow gas into the balloon. If using a
demand flow regulator, continue to flow
gas to the instrument.
The following screen will be shown: