Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 113)

SetupTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 113
referred to in many places of the maintenance and trouble-shooting sections of this
manual.
The various operating modes available under the DIAG menu are:
Table 5-4: Diagnostic Mode (DIAG) Functions
DIAG SUBMENU SUBMENU FUNCTION
Front Panel Mode
Indicator
MANUAL
SECTION
SIGNAL I/O
Allows observation of all digital and analog signals in
the instrument. Allows certain digital signals such as
valves and heaters to be toggled ON and OFF.
DIAG SIGNAL
I/O
5.9.1,
12.1.3 and
12.5.8.1
ANALOG OUTPUT
When entered, the analyzer performs an analog
output step test. This can be used to calibrate a
chart recorder or to test the analog output accuracy.
DIAG ANALOG
OUTPUT
5.9.2 and
12.5.8.2
ANALOG I/O
CONFIGURATION
This submenu allows the user to configure the
analyzer’s analog output channels, including
choosing what parameter will be output on each
channel. Instructions that appear here allow
adjustment and calibration of the voltage signals
associated with each output as well as calibration of
the analog to digital converter circuitry on the
motherboard.
DIAG ANALOG
I/O
CONFIGURATI
ON
5.9.3
ELECTRICAL
TEST
When activated, the analyzer performs an electrical
test, which generates a voltage intended to simulate
the measure and reference outputs of the
SYNC/DEMOD board to verify the signal handling
and conditioning of these signals.
DIAG
ELECTRICAL
TEST
5.9.4 and
12.5.7.2
DARK
CALIBRATION 1
Disconnects the preamp from synchronous
demodulation circuitry on the SYNC/DEMOD PCA to
establish the dark offset values for the measure and
reference channel.
DIAG DARK
CALIBRATION
5.9.5 and
9.6.1
PRESSURE
CALIBRATION 1
Allows the user to calibrate the sample pressure
sensor.
DIAG
PRESSURE
CALIBRATION
5.9.6 and
9.6.2
FLOW
CALIBRATION 1
This function is used to calibrate the gas flow output
signals of sample gas and ozone supply. DIAG FLOW
CALIBRATION
5.9.7 and
9.6.3
TEST CHAN
OUTPUT
Selects one of the available test channel signals to
output over the A4 analog output channel. DIAG TEST
CHAN OUTPUT
5.9.8 and
12.5.8.2
1
These settings are retained after exiting DIAG mode.