50 • Chapter 5: User Mode and Calibration
04 Series for CO(-H2)
8. Press and release POWER MODE. The calibration value begins to flash.
9 . Use AIR to adjust the calibration gas value. The calibration gas value in the instrument
must match the value listed on the calibration gas cylinder you are using. Limits on the
calibration gas value are shown in the table below.
10. Press and release POWER MODE to save the change. The calibration gas value stops
flashing and the unit returns to the gas name screen.
11. Repeat steps Step 7 - Step 10 for the other channel, if necessary.
12. Use AIR to scroll to
ESCAPE
.
13. Press and release POWER MODE to return to the
CAL--P
item in the
A-CAL
menu.
14. Press AIR to scroll to
ESCAPE
.
15. Press and release POWER MODE to return to the
A-CAL
item in the
GAS CAL
menu.
16. See “Exiting the GAS CAL Menu” on page 52 to return to User Mode.
Making Cylinder Selections in CYL SEL
The
CYL SEL
menu item allows you to assign cylinders for calibration. As shipped from the
factory, CO is assigned to Cylinder A and H
2
is assigned to Cylinder B. There are 5 cylinder
assignments available: A, B, C, D, and E.
1. While in User Mode, press AIR to scroll to
GAS CAL
.
2. Press and release POWER MODE. The
AIR CAL
menu item appears.
3. Use AIR to scroll to the
A-CAL
item (
E-CAL
if
E-CAL
in User Mode is set to
ON
).
Table 11: Calibration Concentration Limits
Channel
Min. Cal.
Concentration
Max. Cal
Concentration
Carbon Monoxide
15 ppm
2,000 ppm
Hydrogen (only needs to be
done when sensor is replaced)
25 ppm
2,000 ppm
CO
50
CAL-P
ppm
GAS CAL
A-CAL