Sensor Integration and Calibration
Hydro-Probe XT User Guide HD0538 Rev: 1.6.0 45
2.3
Storing calibration data
There are two ways of storing the calibration data, either in the control system or in the Hydro-
Probe XT. Both methods are explained in the following sections.
Calibration inside the sensor will involve updating the coefficient values using the digital
RS485 interface. True moisture can then be obtained from the sensor.
To communicate using the RS485 interface, Hydronix has developed communications
software called Hydro-Com which is free to download from www.hydronix.com.
Both the Hydro-Com software as well as the Hydro-View IV (an advanced touch screen
configuration and display unit) contain a dedicated material calibration page which allows a
multiple point calibration to be generated for a material.
To calibrate outside of the sensor, the control system will require its own calibration function
and the moisture conversion can then be calculated using the linear Unscaled output from the
sensor. For guidance on setting the output see Figure 32.
2.3.1
Calibration inside the Hydro-Probe XT
Figure 35: Calibration inside the Hydro-Probe XT
The advantages of calibrating inside the Hydro-Probe XT are:
•
Advanced free software improving calibration accuracy, including diagnostics
software.
•
Control system does not need modification to calibrate the sensor.
•
Ability to use Hydronix known calibration data for different materials.
•
Calibrations can be transferred between sensors.
Unscaled (U/S)
Analogue output represents
true moisture %
Moisture =
B x (U/S)+C-SSD
Control
system
PC running
Hydro-Com
or
a Hydro-View IV
unit
Summary of Contents for Hydro-Probe XT
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Page 6: ...6 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
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Page 14: ...Chapter 1 Introduction 14 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
Page 42: ...Chapter 4 Configuration 42 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
Page 58: ...Chapter 7 Sensor diagnostics 58 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
Page 60: ...Chapter 8 Technical specification 60 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
Page 66: ...Appendix B Document Cross Reference 66 Hydro Probe XT User Guide HD0538 Rev 1 6 0 ...
