Section 7 | Calibration
Page | 35
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2021
– Valeport Ltd
Clicking
Next
will then apply the calibration coefficients to the TideMaster and run a cal check. This will
display raw data in dBar, and calibrated data in Metres and Feet. The calibrated data should correspond to
the current tide height relative to your datum.
Clicking Next will apply the calibration coefficients to the TideMaster and run a cal check. This will display
raw data in dBar, and calibrated data in Metres and Feet. The calibrated data should correspond to the
current tide height relative to your datum.
7.2 Radar Sensor
The VRS-20 radar sensor measures distance to a water surface, this measurement is factory calibrated and
the calibration is held within the radar sensor. This calibration is independent of environmental conditions.
To transform this range to a tide height the offset between the Radar Datum and a Local Datum must be
established. The relationships between range, working range, tide height, radar datum and local datum are
shown in
7.2.1 Working Range
To reduce the possibility of spurious returns and improve the data quality, a valid working range can be set
on the VRS-20. The VRS-20 will ignore any returns from outside of this range so it is important to ensure the
minimum working range is set to a level above Highest Astronomical Tide and the maximum working range
to a level below Lowest Astronomical Tide.
At the communications established screen select the Calibration option. The following two screens will be
presented:
