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Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 224
Toggles parameter
ON/OFF
Exit returns to
DIAG display & all values
return to software control
DIAG SIGNAL I/O
PREV NEXT ENTR EXIT
DIAG I/O 0 ) EXT_ZERO_CAL=ON
PREV NE X T JUMP PRNT EXIT
DIAG I/O 22) WHEEL_HTR=ON
PREV NEXT JUMP ON PRNT EXIT
DIAG I/O 28) SAMPLE_PRESSURE=2540 MV
PREV NEXT JUMP PRNT EXIT
DIAG I/O 22) WHEEL_HTR=OFF
PREV NEXT JUMP OFF PRNT EXIT
If parameter is an
input si
g
nal
If parameter is an output
si
g
nal or control
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG EXIT
SAMPLE ENTER SETUP PASS : 818
8 1 8 ENTR EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL SETUP
Figure 10-2: Example of Signal I/O Function
10.1.4. Internal Electronic Status LEDs
Several LED’s are located inside the instrument to assist in determining if the analyzer’s CPU, I
2
C bus
and relay board, GFC wheel and the sync/demodulator board are functioning properly.
10.1.4.1. CPU Status Indicator
DS5, a red LED, that is located on upper portion of the motherboard, just to the right of the CPU board,
flashes when the CPU is running the main program loop. After power-up, approximately 30 to 60