EAGLE 2 Operator’s Manual PID Calibration • 153
Calibrating with a 5-Gas Cylinder
1. See “Calibration Supplies and Equipment” on page 56 for a description
of the necessary calibration supplies. See Table 17 on page 179 for
available cylinders. Make sure your calibration cylinder is appropriate for
the PID detection range.
NOTE: The 5-gas calibration cylinder that includes LEL CH
4
/O
2
/CO/H
2
S/
isobutylene is a proprietary gas mix developed by RKI Instruments,
Inc. for calibrating a PID sensor in the presence of the other gases
during an auto calibration. It can also be used for a single calibration
of a PID sensor. Do not use a similar gas mix provided by any other
manufacturer when calibrating a PID channel. Use of a gas mix
from another manufacturer that includes isobutylene and these other
gases will result in an inaccurate calibration.
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
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