ABB WICB Benutzerhandbuch

2600T Series Pressure transmitters | OI/266/WIHART-EN   9

3 Transmitter overview

3.2 Range & Span consideration

The 2600T Transmitter Specification Sheets provide all 
information concerning the Range and Span limits in relation to 
the model and the sensor code.

The terminology currently used to define the various 
parameters is as follows:

  URL:  Upper Range Limit of a specific sensor. The highest    
     

value of the measured value that the transmitter can   

     

be adjusted to measure.

  LRL:   Lower Range Limit of a specific sensor. The lowest    
     

value of the measured value that the transmitter can   

     

be adjusted to measure.

  URV:   Upper Range Value. The highest value of the  

 

     

measured value to which the transmitter is calibrated.

  LRV:   Lower Range Value. The lowest value of the   

 

     

measured value to which the transmitter is calibrated.

  SPAN: The algebraic difference between the Upper and  

 

     

Lower Range Values. The minimum span is the  

 

     

minimum value that can be used without degradation  

     

of the specified performance.

  TD:   (or Turn Down Ratio)is the ratio between the  

 

     

maximum span and the calibrated span.

The transmitter can be calibrated with any range between the 
LRL and the URL with the following limitations:

LRL ≤ LRV ≤ (URL - CAL SPAN)

CAL SPAN ≥ MIN SPAN

URV ≤ URL