RKI Instruments EAGLE 2 Manual - Manual (Page 252)

242 • Infrared Methane Calibration EAGLE 2 Operator’s Manual
maximum accuracy in the %vol range, the sensor may be calibrated to
50 %vol.
To use the auto calibration method to calibrate a multi-channel instrument
that includes an infrared methane channel, do the following:
1. See “Calibration Supplies and Equipment” on page 56 for a description
of the necessary calibration supplies. In addition to an appropriate multi-
gas cylinder that is used to calibrate any active standard channels, you
will also need a cylinder to calibrate the infrared methane channel. See
Table 29 on page 251 for available cylinders. Make sure your calibration
cylinder is appropriate for the infrared methane detection range.
2. Find a fresh-air environment. This is an environment free of toxic or
combustible gases and of normal oxygen content (20.9%).
3. While in Measuring Mode, press and hold the RANGE ▼ SHIFT button,
then press the DISPLAY ADJUST NO button and release both buttons.
4. If the unit prompts you for the password, enter it by using the AIR ▲
YES and RANGE ▼ SHIFT buttons to select each password number and
then pressing and releasing POWER ENTER RESET to enter the number
and move on to the next one.
5. The Calibration Mode Screen displays with the cursor next to AUTO
CALIBRATION.
6. Move the cursor to the PERFORM AIR ADJUST menu item by using
the RANGE ▼ SHIFT button.
CALIBRATION MODE
> AUTO CALIBRATION
SINGLE CALIBRATION
PERFORM AIR ADJUST
NORMAL OPERATION
CALIBRATION MODE
AUTO CALIBRATION
SINGLE CALIBRATION
> PERFORM AIR ADJUST
NORMAL OPERATION