MAN0923_Issue 3_04/15
Touchpoint Pro
Operating Instructions
199
15. Appendix 2 - Configurable
Parameter Reference Guide
15.1.19 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 incorrect application of gas.
Parameter Name
Default Setting Value Range
Comment
Maximum Zero Offset
5 mA
1 to 15 mA
During calibration, the “Zero Signal Too High” warning is set if the
zero signal exceeds the Maximum Zero Offset
Minimum Zero Offset
3 mA
1 to 8 mA
During calibration, the “Zero Signal Too Low” warning is set if the
zero signal is below the Minimum Zero Offset
Maximum Span Signal 20.0 mA
8.0 to 24.0 mA
During calibration, the “Calibration Signal Too High” warning will
be set if the span signal exceeds the Maximum Span Signal.
Minimum Span Signal 5 mA
0.0 to 12.0 mA
During calibration, the “Calibration Signal Too Low” warning will be
set if the span signal is below the Minimum Span Signal
15.1.20 Calibration Span Gas Settings
Access Level: Engineer
Note: 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.
Parameter Name
Default Setting Value Range
Comment
Maximum Span Gas Conc 100 %FSD
80 to 100 %FSD (According to
sensor range)
Sets the Maximum Span Gas Concentration that
can be used during calibration. Must be greater
than the Minimum Span Gas Conc.
Minimum Span Gas Conc
30 %FSD
15 to 80 %FSD (According to
sensor range)
Sets the Minimum Span Gas Concentration that
can be used during calibration. Has to be less than
the Maximum Span Gas Conc.
Default Span Gas Conc
50 %FSD
According to sensor range
Sets the Default Span Gas Concentration to be
used during calibration.
15.1.21 Inhibit Signalling Settings
Access Level: Engineer
Parameter Name
Default Setting
Value Range
Comment
Inhibit Signalling Enable Disabled
Enabled / Disabled
If enabled, a specific signal level from the sensor will activate an
inhibit condition for the channel.
Inhibit Level Max
2.0 mA
1.0 to 3.9 mA
The recommended minimum difference between Inhibit Level
Max and Inhibit Level Min is 0.2 mA
Inhibit Level Min
2.0 mA
0.8 to 3.8 mA