Teledyne Tablet Accessory T803 Manual De Usuario

Setup Menu 

Teledyne API T803 CO2/O2 Analyzer Operation Manual 

64    

5.4. SETUP  RNGE: ANALOG OUTPUT REPORTING 

5.4.1. PHYSICAL RANGE VERSUS ANALOG OUTPUT REPORTING 

Functionally, the T803 analyzers have one hardware PHYSICAL RANGE that is 
capable of determining  concentrations from 0.00% to 100.00% for O

2

; CO

2

 is 

variable depending on the exact CO

2

 sensor. 

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, data resolution problems can occur for most analog recording devices.  For 
example, in a typical application where a T803 is being used to measure 
atmospheric O

2

 concentration, the full scale of expected values is only 21% of the 

instrument’s full measurement range.  Unmodified, the corresponding output 
signal would also be recorded across only 21% of the range of the recording 
device. 

The T803 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. 

07276B DCN6418