28
CI/AZ40-EN Rev. A
7
Calibration and sensor setup
Ensure all electrical connections have been made and switch on
the power to the transmitter. If the sensor is being
commissioned for the first time, sensor calibration and set-up is
recommended for best results.
Test gas recommendations
The zero test gas should be the test gas of lowest oxygen
content. The span test gas should be the test gas of highest
oxygen content.
Manual (test gas) calibration
To perform a manual calibration at the transmitter:
1. From any
Operator
page, press the
key (below the
CAL
prompt).
The
Calibrate
level screen is displayed:
2. Press the
key (below the
Select
prompt) the
Manual
Calibration
menu option is highlighted:
CAUTION – Minor injuries
Do not attempt to setup the transmitter unless the
sensor and transmitter are fully installed and ready for
operation.
IMPORTANT (NOTE)
— Before attempting calibration ensure the correct test
gas values have been entered – refer to Operating
instruction OI/AZ40-EN.
—
Refer to
page 34 for menu overview.
–
Refer to
Operating instruction OI/AZ40-EN for menu
descriptions.
IMPORTANT (NOTE)
Although the lowest and highest CO test gases may be
combined with the oxygen test gases in any order, for
maximum
accuracy
when measuring sample gases of
low oxygen content (for example, combustion
processes), it is recommended that the CO span test
gas is combined with the lowest oxygen test gas (zero
gas). The span gas can be air from a compressed air line
(20.95 % O
2
) if a 0 to 25 % oxygen range is selected –
recommended.
In Conf Alarm
CAL
Autoscroll
Menu
Exit
Select
Calibrate
Back
Select
Calibrate
Manual Calibration
