Honeywell Touchpoint Pro Technical Handbook page 88

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.
Parameter Name
Maximum Zero
Offset
Minimum Zero Offset -90 mV
Maximum Span
Signal
Minimum Span
Signal
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.
Parameter Name
Maximum Span Gas
Concentration
Minimum Span Gas
Concentration
Default Span Gas
Concentration
Note: MN and NN depend on the sensor type selected.
Part. No. 2400M2501_6
CONFIGURATION
Default Value Range
Setting
100 mV 100mV
-90mV
100 mV 100 to 300 mV
0 mV -50 to 100 mV
Default Setting
Gas Range Max
Gas Range Min + MN * (Gas
Range Max - Gas Range Min)
Gas Range Max - NN * (Gas
Range Max - Gas Range Min)
Comment
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
Value Range
Minimum
Gas Range Max - 0.20 * (Gas
Range Max - Gas Range Min)
Gas Range Min + 0.15 * (Gas
Range Max - Gas Range Min)
Gas Range Max - 0.70 * (Gas
Range Max-Gas Range Min)
81
Maximum
Gas Range Max
Gas Range Max - 0.20 * (Gas
Range Max - Gas Range Min)
Gas Range Max
Touchpoint Pro
Technical Handbook