Teledyne gfc 7000ta operation manual Setup  More  Diag Using the Diagnostics Functions

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.13.SETUP  MORE  DIAG: Using the Diagnostics Functions

A series of diagnostic tools is grouped together under the SETUPMOREDIAG menu. As these parameters are dependent on firmware revision (see Menu Tree A-6 in Appendix A). The individual parameters, however, are explained in more detail in the indicated in 6-15. These tools can be used in a variety of troubleshooting and diagnostic procedures and are referred to in many places of the maintenance and trouble-shooting s.

Table 6-15: GFC 7000TA Diagnostic (DIAG) Functions

DIAGNOSTIC FUNCTION AND MEANING	Front Panel
	Mode Indicator
SIGNAL I/O: Allows observation of all digital and analog signals in
the instrument. Allows certain digital signals such as valves and	DIAG I/O	6.13.2
heaters to be toggled ON and OFF.
ANALOG OUTPUT: When entered, the analyzer performs an analog
output step test. This can be used to calibrate a chart recorder or	DIAG AOUT	6.13.3
to test the analog output accuracy.
ANALOG I/O CONFIGURATION: the signal levels of the instruments
analog outputs may be calibrated (either individually or as a	DIAG AIO	6.13.4
group). Various electronic parameters such as signal span, and
offset are available for viewing and configuration.
ELECTRIC TEST: The analyzer is performing an electric test. This	DIAG OPTIC	6.13.5
test simulates IR detector signal in a known manner so that the
proper functioning of the sync/demod board can be verified.
DARK CALIBRATION: The analyzer is performing a dark
calibration procedure. This procedure measures and stores the	DIAG ELEC	6.13.6
inherent dc offset of the sync/demod board electronics.
PRESSURE CALIBRATION: The analyzer records the current
output of the sample gas pressure sensor. This value is used by	DIAG PCAL	6.13.7
the CPU to compensate the CO2 concentration.
FLOW CALIBRATION: This function is used to calibrate the gas flow	DIAG FCAL	6.13.8
output signal. This setting is retained when exiting DIAG.
TEST CHAN OUTPUT: Configures the A4 analog output channel.	DIAG TCHN	6.13.9

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