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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 68
To view and clear warning messages:
SAMPLE SYSTEM RESET CO2 = 0.00
TEST CAL MSG CLR SETUP
Press CLR to clear the current
message.
If more than one warning is active, the
next message will take its place
Once the last warning has been
cleared, the analyzer returns to
SAMPLE mode
SAMPLE RANGE=500.000 PPM CO2 = 0.00
< TST TST > CAL MSG CLR SETUP
SAMPLE SYSTEM RESET CO2 = 0.00
TEST CAL MSG CLR SETUP
TEST deactivates warning
messages
MSG displays warning messages.
NOTE:
If the warning message persists
after several attempts to clear it,
the message may indicate a
real problem and not an artifact
of the warm-up period
Figure 6-3: Viewing and Clearing GFC 7000TA WARNING Messages
6.3. Calibration Mode
Pressing the CAL key switches the GFC 7000TA into multi-point calibration mode. In this mode, the user
can calibrate the instrument or check the instruments calibration with the use of calibrated zero or span
gases.
If the instrument includes either the zero/span valve option or IZS option, the display will also include
CALZ and CALS keys. Pressing either of these keys also puts the instrument into multipoint calibration
mode.
The CALZ key is used to initiate a calibration of the zero point.
The CALS key is used to calibrate the span point of the analyzer. It is recommended that this span
calibration is performed at 90% of full scale of the analyzer’s currently selected reporting range.
Because of their critical importance and complexity, calibration operations are described in detail in
Section 7 of this manual. For more information concerning the zero/span, zero/span and IZS valve
options, See Section 5.4.