Teledyne M300EM User Manual

6.6.2. ANALOG OUTPUT RANGES FOR CO CONCENTRATION 

The analyzer has several active analog output signals related accessible through a connector on the rear panel 
(see Figure 3-2). 

 

 

 

 

All four outputs can be configured either at the factory or by the user for full scale outputs of 0.1 VDC, 1VDC, 
5VDC or 10VDC.   

Additionally A1, A2 and A3 may be equipped with optional 0-20 mADC current loop drivers and configured for 
any current output within that range (e.g.  0-20, 2-20, 4-20, etc.).  The user may also adjust the signal level and 
scaling of the actual output voltage or current to match the input requirements of the recorder or datalogger (See 
Section 7.4.5). 

The A1 and A2 channels output a signal that is proportional to the CO

 

concentration of the sample gas.  Several 

modes are available which allow them to operate independently or be slaved together (See Section 6.6.3). 

EXAMPLE:  

A1 OUTPUT:  Output Signal = 0-5 VDC representing 0-1000 ppm concentration values 

A2 OUTPUT:  Output Signal = 0 – 10 VDC representing 0-500 ppm concentration values. 

Output A3 is only active if the CO

2 

or O

2

 sensor option is installed.  In this case a signal representing the 

currently measured CO

2 

or O

2

 concentration is output on this channel. 

The output, labeled A4 is special.  It can be set by the user (See Section 7.4.6) to output several of the test 
functions accessible through the <TST TST> keys of the units sample display.   

04288D DCN5752