Teledyne M300EM User Manual

7.3. SETUP   MORE  DIAG: USING THE DIAGNOSTICS 

A series of diagnostic tools is grouped together under the SETUPMOREDIAG menu, as these parameters 
are dependent on firmware revision (see Appendix A).  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 sections 
of this manual. 

The various operating modes available under the DIAG menu are: 

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. 

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. 

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. 

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. 

 

Disconnects the preamp from synchronous 
demodulation circuitry on the SYNC/DEMOD PCA to 
establish the dark offset values for the measure and 
reference channel. 

Allows the user to calibrate the sample pressure 
sensor. 

 

This function is used to calibrate the gas flow output 
signals of sample gas and ozone supply. 

OUTPUT 

Selects one of the available test channel signals to 
output over the A4 analog output channel. 

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These settings are retained after exiting DIAG mode.

 

04288D DCN5752