Sutron Corporation RLR-0003-1 Manuel D’Utilisation
Bringing the Benefits of Real-Time Data Collection to the World
14
Stage, Distance to Water, and Measurement Point
Ultimately, the job the radar is to compute a stage measurement. However, the direct measurement made by
the radar is distance to water.
the radar is distance to water.
Distance to water is the length between the radar and the water surface.
Stage is the depth of water; for a river it is distance between the water surface and the riverbed.
Stage = Measurement point – Distance to water
Measurement point is the length between the radar and the riverbed (or ocean floor or well bottom).
(NOTE: Calibration of the radar unit has been made with respect to the front cover of the
antenna unit.)
(NOTE: Calibration of the radar unit has been made with respect to the front cover of the
antenna unit.)
Measuring Point:
Bridge or Structure over Water
Stage
Water Level (Stage)
Riverbed:
Distance to Water
Staff
Gauge
Gauge
Stage Reading:
Measuring Point = Stage + Distance to Water
or
Stage = Measuring Point – Distance to Water
” command
or the “
Measurement point can be accessed via the front panel
Setting Stage
When the radar is installed, you will typically read the current stage off a staff gauge and then set this new
stage into the radar.
To set the stage via front panel, power up the radar, wait for it to show a stage reading (which will be negative
until the stage is set), and the press SET. Enter the correct stage and press set again. Don‟t forget to change
the sign of the stage to “+”. It is also possible to use SDI-12
stage into the radar.
To set the stage via front panel, power up the radar, wait for it to show a stage reading (which will be negative
until the stage is set), and the press SET. Enter the correct stage and press set again. Don‟t forget to change
the sign of the stage to “+”. It is also possible to use SDI-12
and command line
the stage.
The radar compares this user entered value with its own reading and uses it to set the Measuring Point. From
then on, the radar will report the stage relative to this Measuring Point – so it will match the staff gauge.
The radar compares this user entered value with its own reading and uses it to set the Measuring Point. From
then on, the radar will report the stage relative to this Measuring Point – so it will match the staff gauge.