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Chapter 5: User Mode and Calibration
OX-04 Operator’s Manual
Performing a Span Adjustment in E-CAL
The
E-CAL
item only appears if
E-CAL
in User Mode is set to
ON
(factory setting is
OFF
). If
E-CAL
is set to
OFF
, see page 46 for calibration instructions.
Preparing for Span Adjustment
To adjust the span on the OX-04, you need:
• Calibration gas cylinder
• 0.25 LPM fixed flow regulator
• Non-absorbent tubing
• Calibration cup
1. Confirm that the OX-04’s calibration gas value matches the concentration listed on the
calibration gas cylinder as described on page 53.
2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed
flow regulator onto the calibration cylinder.
3. Install the calibration cup onto the OX-04. Be sure the calibration cup is installed in the
correct direction and that it is pushed on all the way.
4. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).
Table 11: Calibration Concentration Limits
Channel
Min. Cal.
Concentration
Max. Cal.
Concentration
Oxygen (O
2
)
0.0%
18.0%
POW ER
MODE
AIR
Front View
Side View