Teledyne gfc 7000ta User Manual

 

Teledyne Analytical Instruments 

89 

 RNGE: Analog Output Reporting Range 

The analyzer has three active analog output signals, accessible through a connector on the rear panel. 

 

All three 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 and A2 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 data logger (See Section 6.13.4). 

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

2

 concentration of the sample gas.  

Several modes are available which allow them to operate independently or be slaved together (See 
Section 6.7).  The user may also select between a variety of reporting range spans (See Sections 6.8.3, 
6.8.4 and 6.8.5). 

EXAMPLE:  

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

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

Output A3 is only active if the O

2

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

currently measured O

2

 concentration is output on this channel. 

The output, labeled A4 is special.  It can be set by the user (See Section 6.13.9) to output several of the 
test functions accessible through the <TST TST> keys of the units sample display.