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Advanced Features Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 133
7.4.3. 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 or adjusted manually.
During automatic calibration, the analyzer tells the output circuitry to generate a zero mV signal and high-scale
point signal (usually about 90% of chosen analog signal scale) then measures actual signal of the output. Any
error at zero or high-scale is corrected with a slope and offset.
Automatic calibration can be performed via the CAL button located inside The AOUTS CALIBRATION
submenu. By default, the analyzer is configured so that calibration of analog outputs can be initiated as a group
with the AOUT CALIBRATION command. The outputs can also be calibrated individually, but this requires the
AUTOCAL feature be disabled.
7.4.3.1. Enabling or Disabling the AutoCal for an Individual Analog Output
To enable or disable the AutoCal feature for an individual analog output, elect the ANALOG I/O
CONFIGURATION submenu (see Figure 7-4) then press: