EAGLE 2 Operator’s Manual
PID Calibration • 139
Calibrating with a 5-Gas Cylinder
1. See “Calibration Supplies and Equipment” on page 55 for a description of the
necessary calibration supplies. See Table 18 on page 162 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.
7. Press and release the POWER ENTER RESET button. The following screen appears.
CALIBRATION MODE
> AUTO CALIBRATION
SINGLE CALIBRATION
PERFORM AIR ADJUST
NORMAL OPERATION
CALIBRATION MODE
AUTO CALIBRATION
SINGLE CALIBRATION
> PERFORM AIR ADJUST
NORMAL OPERATION
PERFORM
AIR ADJUST?
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