CONFIGURATION 
Part. No. 2400M2501_6    Touchpoint Pro 
  81  Technical Handbook 
9.3.18  Calibration Signal Settings 
Access Level: Engineer 
Note: These settings refer to the range of signal values from the sensor over which calibration will be permitted, and are 
used to avoid incorrect calibration e.g. due to a decaying sensor or incorrect application of gas. 
Not used – Should be set to 100mV 
Not used – Should be set to -90mV 
Maximum allowable signal at 100% FSD for new beads. 
 
Note: This is scaled by the span gas concentration 
entered in the Span Gas Concentration field  
Minimum allowable signal at 100% FSD for aged beads. 
 
Note: This is scaled by the span gas concentration 
entered in the Span Gas Concentration field  
 
9.3.19  Calibration Span Gas Settings 
Access Level: Engineer 
These settings refer to the range of gas concentration values that can be used for span calibration, and are used to ensure 
that the sensor is calibrated at an appropriate level. 
The Maximum Span Gas Concentration and Minimum Span Gas Concentration are the maximum and minimum values 
that can be entered into the Span Gas Concentration field during calibration.  
The Default Span Gas Concentration is the value initially displayed in the Span Gas Concentration field. This may be 
changed by the user during calibration to match the actual gas concentration used.  
Maximum Span Gas 
Concentration 
Gas Range Max - 0.20 * (Gas 
Range Max - Gas Range Min) 
Minimum Span Gas 
Concentration 
Gas Range Min + MN * (Gas 
Range Max - Gas Range Min) 
Gas Range Min + 0.15 * (Gas 
Range Max - Gas Range Min) 
Gas Range Max - 0.20 * (Gas 
Range Max - Gas Range Min) 
Default Span Gas 
Concentration 
Gas Range Max - NN * (Gas 
Range Max - Gas Range Min) 
Gas Range Max - 0.70 * (Gas 
Range Max-Gas Range Min) 
Note: MN and NN depend on the sensor type selected.