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Calibration Chapter 7
Hydro-View / Hydro-Hub User Guide HD0864 Rev 1.0.0 63
The calibration data points define a mathematical best fit line and it is this line, described using
the variables A, B and C, which defines the calibration. The effect of the Quick Start Rules is
to improve this calibration line if the calibration data does not satisfy the criteria as described in
Appendix A. In such cases the mathematical best fit line is modified. The Quick Start Rules can
be used where the calibration samples taken do not result in a large enough moisture variation
to produce an accurate calibration. When the moisture in the material changes enough to
enable calibration samples to be taken over a greater moisture spread the Quick Start Rules
should no longer be used.
It should be noted that the Quick Start Rules have been designed around a sensor mounted at
the suggested angle. See the individual sensor user manuals for more information.
Hydro-Net software enables the selection of one of five Quick Start material types:
• 0-2mm Sand (No.8)
• 0-4mm Sand (No.4)
• 4-8mm Gravel (3/8”)
• 8-16mm Stone (0.5”-0.75”)
• 16-22mm Stone (1”)
If, however, different materials are being measured or the installation is different from the
suggested method, then the Quick Start Rules should be disabled. This is application specific
and should be determined by the engineer commissioning the equipment.
In the graph below, three calibration points have been entered into the table with the Quick Start
Rules enabled. The data does not satisfy the complete criteria and as a result, a warning
message is displayed as shown. The B and C calibration coefficients that describe this line
have been modified.
Figure 102: Quick Start Rules Applied