Teledyne M300EM User Manual

6.6. SETUP  RNGE: ANALOG OUTPUT REPORTING RANGE 

 

6.6.1. PHYSICAL RANGE VERSUS ANALOG OUTPUT REPORTING 

Functionally, the M300E Family of CO Analyzers have one hardware PHYSICAL RANGE that is capable of 
determining CO concentrations between across a very wide array of values.   

M300E 

0 – 1000 ppm 

M300EM 

0 – 5000 ppm 

This architecture improves reliability and accuracy by avoiding the need for extra, switchable, gain-amplification 
circuitry.  Once properly calibrated, the analyzer’s front panel will accurately report concentrations along the 
entire span of its physical range.   

Because many applications use only a small part of the analyzer’s full physical range, this can create data 
resolution problems for most analog recording devices.  For example, in an application where an M300E is being 
used to measure an expected concentration of typically less than 50 ppm CO, the full scale of expected values is 
only 4% of the instrument’s full 1000 ppm measurement range.  Unmodified, the corresponding output signal 
would also be recorded across only 2.5% of the range of the recording device. 

The M300E/EM Analyzers solve this problem by allowing the user to select a scaled reporting range for the 
analog outputs that only includes that portion of the physical range relevant to the specific application.   

Only this REPORTING RANGE of the analog outputs is scaled, the physical range of the analyzer and the 
readings displayed on the front panel remain unaltered. 

 

04288D DCN5752