Teledyne M300EM User Manual

7.4. USING THE M300E/EM ANALYZER’S ANALOG OUTPUTS. 

The M300E/EM Analyzer comes equipped with four analog outputs.   

  The first two outputs (A1 & A2) carry analog signals that represent the currently measured concentration 

of CO (see Section 6.6.2).   

  The third output (A3) is only active if the analyzer is equipped with one of the optional 2

nd

 gas sensors (e.g. 

O

2

 or CO

2

). 

  The fourth output (A4) outputs a signal that can be set to represent the current value of one of several test 

functions (see Table 7-10). 

 

7.4.1. ACCESSING THE ANALOG OUTPUT SIGNAL CONFIGURATION 

The following lists the analog I/O functions that are available in the M300E/EM Analyzer. 

Initiates a calibration of the A1, A2, A3 and A4 analog output 
channels that determines the slope and offset inherent in the 
circuitry of each output.  
These values are stored and applied to the output signals by 
the CPU automatically. 

Sets the basic electronic configuration of the A1 output (CO 
Concentration).   
There are four options: 

  RANGE

:  Selects the signal type (voltage or current loop) 

and level of the output. 

  REC OFS: Allows them input of a DC offset to let the user 

manually adjust the output level. 

  AUTO CAL: Enables / Disables the AOUT CALIBRATED 

feature. 

  CALIBRATED: Performs the same calibration as AOUT 

CALIBRATED, but on this one channel only.   

  Same as for CONC_OUT_1 but for analog channel A2. 

  Same as for CONC_OUT_1 but for analog channel A3 but 

only if either the optional O

2

 or CO

2

 sensors are installed. 

  Same as for CONC_OUT_1 but for analog channel A4 

(TEST CHANNEL). 

Initiates a calibration of the A-to-D Converter circuit located on 
the Motherboard. 

1 

Any changes made to RANGE or REC_OFS require recalibration of this output. 

04288D DCN5752