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Sensor Settings and Calibration
AirLink 6940XP Operator’s Manual
Procedure
1. If you are calibrating with EtO calibration gas, connect the tubing to the regulator, turn the
regulator on, and allow gas to flow for 1 minute before proceeding.
If you are calibrating with HCl calibration gas, connect the tubing to the regulator, turn the
regulator on, and allow gas to flow for 10 minutes before proceeding.
2. If necessary, enter the Product Settings and Configuration menu by pressing and holding
MENU
for approximately 6 seconds.
Press
ADD
or
SUB
to navigate to the desired sensor settings menu, then press
MENU
to
select the menu.
3. Press and release
ADD
until the “Cal” menu item appears. Press
MENU
to select the “Cal”
menu item.
4. Press
ADD
to proceed to the Auto Calibration confirmation screen.
To cancel calibration and return to the Sensor Settings menu, press
SUB
. Pressing
MENU
or
BACK
will also return the instrument to the Sensor Settings menu.
Table 4: Surrogate Calibration Gases
Detected Gas
Surrogate Calibration Gas
Factor
Arsine (AsH
3
)
Phospine (PH
3
)
1.4
Chlorine Dioxide (ClO
2
)
Chlorine (Cl
2
)
1
Formaldehyde (CH
2
O)
Carbon Monoxide (CO)
0.2
Hydrogen Fluoride (HF)
Chlorine (Cl
2
)
7.5
Ozone (O
3
)
Chlorine (Cl
2
)
0.8
Nitrogen Dioxide (NO
2
)
1
