EAGLE 2 Operator’s Manual
Infrared Methane Calibration • 217
3. Press and release POWER ENTER RESET to save the setting and return to the main
menu.
4. Use the DISPLAY ADJUST NO button to scroll through the rest of Display Mode
and enter Normal Operation.
Infrared Methane Calibration
An infrared methane channel can be calibrated using the auto calibration method or the
single calibration method. To calibrate an infrared methane channel using the single
calibration method, see “Calibrating Using the Single Calibration Method” on page 62
and follow the instructions for calibrating a single channel. If your instrument is a multi-
channel instrument that includes an infrared methane channel, RKI Instruments, Inc.
recommends using the auto calibration method for convenience. The calibration
instructions below show a 5 channel instrument which has the four standard channels,
LEL/oxygen/H
2
S/CO, and an infrared methane channel configured for autoranging.
The standard factory calibration for the autoranging infrared methane sensor is to 50
%LEL. If your instrument is configured for autoranging and you need 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 55 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 30 on page 225 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
.
CALIBRATION MODE
> AUTO CALIBRATION
SINGLE CALIBRATION
PERFORM AIR ADJUST
NORMAL OPERATION
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