HS2 and HS2P
14
otherwise occupied by the fine soil fraction, but they do not hold water in the
same manner as soil. If two proximal measurements are made in rocky soil, the
measured water content can differ significantly if large quantities of rock
occupy part of the sensitive volume of one measurement but not the other.
6.4.4.4 Measurements in Special Materials
The HydroSense II was designed for use in agricultural soils, but the
measurement technique underlying the instrument supports other potential
applications. Other porous media can be monitored using the period value
shown on the display. The period is strongly related to dielectric permittivity of
the material surrounding the sensor rods and can be used as a relative value to
measure changes in the material of interest. Period generally increases
proportionally with water content. For actual water content values, a soil
specific calibration can be performed using an independent measure of water
content such as gravimetric analysis. A calibration equation can then be
derived to relate period to water content.
7. User Interface
The following section contains a detailed description of the HydroSense II user
interface.
Screenshots included in this section were captured using factory default
settings (except where noted); however, they may not reflect the exact image
seen on your screen because of configuration settings chosen or operating
system updates
Red highlights on the images mark areas of interest. The highlights are added
for illustrative purposes and are not present on the screen of an actual display.
7.1 Buttons
User Interface Buttons
Button
Function
Power/MENU — To turn the HydroSense II on or off, press and
hold this button for 3 seconds. When pressed for less than 3
(p. A-1)
displayed.
READ/OK — Triggers a new measurement in the
(p. 15)
. Also used to select an item in a list or to answer “OK” to
prompts.
Back/STORE — From the
(p. 15)
, used to store the
current reading to flash memory. In the menu system, used to
move “Back” to the previous menu.
Up — Moves the cursor up.
Down — Moves the cursor down.
Left — Moves the cursor to the left.
Right — Moves the cursor to the right.
