Teledyne API T803 CO2/O2 Analyzer Operation Manual Setup Menu
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To change the output type and range, select the ANALOG I/O
CONFIGURATION submenu (see Section 5.10.1) then press,

5.10.3. CALIBRATION OF THE ANALOG OUTPUTS

Analog output calibration should to be carried out on first startup of the analyzer
(performed in the factory as part of the configuration process) or whenever
recalibration is required. The analog outputs can be calibrated automatically,
either as a group or individually, or adjusted manually.
In its default mode, the instrument is configured for automatic calibration of all
channels, which is useful for clearing any analog calibration warnings associated
with channels that will not be used or connected to any input or recording device,
e.g., datalogger.
Manual calibration should be used for the 0.1V range or in cases where the
outputs must be closely matched to the characteristics of the recording device.
Manual calibration requires the AUTOCAL feature to be disabled.
07276B DCN6418