58 • Calibrating Using the Auto Calibration Method
EAGLE 2 Operator’s Manual
Performing a Span Adjustment in Auto Calibration
1. Install the demand flow regulator onto the calibration cylinder.
2. Connect the sample tubing to the demand flow regulator.
3. Install the probe on the EAGLE 2 inlet fitting. Make sure the probe is complete with
internal O-ring and membrane and that the two halves of the probe are tightened
firmly together to avoid leaks that can affect the calibration. See Figure 21,
“Replacing the Particle Filter and Hydrophobic Filter Disk” on page 72 for an
illustration of the internal parts of the probe.
4. Move the cursor next to the
AUTO CALIBRATION
menu item by using the AIR
▲
YES button.
5. Press and release the POWER ENTER RESET button to display the Calibration Gas
Values Screen.
The gas concentrations displayed in the Calibration Gas Values Screen must match
the gas concentrations listed on the 4-gas calibration cylinder.
If
all
concentrations match, go to Step 16.
If
one or more
concentrations
do not
If you do not want to continue with the calibration, press and release the DISPLAY
ADJUST NO button to return to the Calibration Mode Screen.
NOTE:
The RKI 4-gas cylinder typically contains 12% O
2
by volume. When using the
auto calibration method, be sure to set the “OXY” auto calibration value to
agree with the concentration listed on the cylinder’s label, not zero.
6. To adjust the values on the screen, press and hold the RANGE
▼
SHIFT button, then
press the DISPLAY ADJUST NO button and release both. The following screen
appears with the cursor next to
CH4
.
CALIBRATION MODE
> AUTO CALIBRATION
SINGLE CALIBRATION
PERFORM AIR ADJUST
NORMAL OPERATION
CAL GAS VALUES
CH4 50 %LEL
OXY 12.0 vol%
H2S 25.0 ppm
CO 50 ppm
ENTER TO BEGIN CAL
ADJUST AUTO
CALIBRATION VALUES
> CH4 50 %LEL
OXY 12.0 vol%
H2S 25.0 ppm
CO 50 ppm
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