46 • Chapter 5: User Mode and Calibration
04 Series for CO(-H2)
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 pg.43 for calibration instructions.
Preparing for Span Adjustment
To adjust the span on the CO-04C, you need:
•
Calibration gas cylinder
•
0.25 LPM fixed flow regulator
•
Non-absorbent tubing
•
Calibration cup
1. Confirm that the CO-04C’s calibration gas value matches the concentration listed on the
calibration gas cylinder as described on pg.49.
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 CO-04C. 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”).
Performing a Calibration
1. While in User Mode, press AIR to scroll to
GAS CAL
.
2. Press and release POWER MODE. The
AIR
item appears.
Table 10: Calibration Concentration Limits
Channel
Min. Cal.
Concentration
Max. Cal.
Concentration
Carbon Monoxide
15 ppm
2,000 ppm
Hydrogen (only needs to be done
when sensor is replaced)
25 ppm
2,000 ppm
POW ER
MODE
AIR
Front View
Side View
GAS CAL
