30
The FieldScout TDR is fully calibrated at the factory. Further calibration
is not required nor recommended. The meter has internal calibrations for
standard, sand, and high
-
clay soil types which will work for many soils.
Each meter will have a small difference in how it responds to identical
soil conditions. This can be due to air being introduced while measuring,
bent probes, loose probes, sensor drift or component tolerances. The me-
ter allows for adjustments to the calibration to account for these differ-
ences. Should the user prefer to perform the calibration; the following are
required:
1.
A clean glass or plastic container. The container must be at least
10cm
(4”)
wide and at least 5.08cm
(2”)
longer than the length of the
TDR rods.
2.
A sufficient volume of unused distilled or de
-
ionized water to fill the
above container.
Note: Tap water cannot be substituted
.
Procedure:
1.
Pour all of the distilled/deionized water into the container. The water
level must be deeper than the rods currently installed. Note: The wa-
ter and container must be free of minerals and salts to calibrate
properly.
2.
From the Settings Menu (p. 10), set the rod length to the correct
length of the rods currently installed.
3.
From the Settings Menu, choose the Calibration option.
4.
Press the
Select
button to initiate the calibration process. Follow the
display messages.
5.
While keeping objects and personnel clear from the area; raise the
meter so the rods are in the air. Press the
MENU|SELECT
button
and wait until the meter indicates it is ready.
6.
Immerse the rods completely in the deionized or distilled water until
the sensor base is in contact with the liquid. Keep the sensor base and
rods centered in the container.
7.
Press the
MENU|SELECT
button and wait until the meter indicates
it is ready.
The meter will then show that the calibration is complete for that specific
rod length. If more than one rod size is being used, a calibration opera-
tion must be done for each rod length used.
Appendix 4: Calibration
Содержание FIELDSCOUT 6435
Страница 1: ...TDR 350 Soil Moisture Meter PRODUCT MANUAL Item 6435 ...
Страница 5: ...5 Product dimensions ...
Страница 21: ...21 Fig 3 2 D Contour Plot in SpecConnect Fig 4 Trend Report ...
