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Installation
4. Connect the Tensiometer to a readout unit. Check the position of
the yellow sticker. Carefully insert the T8 into the borehole up to
the stop while continuously observing the pressure signal. Using
the TB25 auger you feel a light resistance at the last 6 cm
indicating proper soil contact of the ceramic.
Do not use any force. Do not hit the Tensiometer - this may
damage cup and pressure sensor.
Especially in clayey soils the pressure reading must be monitored
as high pressures might build up! The pressure must not exceed
200 kPa
5. Press the soil surface with your boots gently to the shaft to close
the gap.
6. Push the shaft water retaining disk down to cover the soil
surface. This prevents water from running down into the
borehole along the shaft.
7. Leave the protective plastic cap on the plug whenever the plug is
not connected!
8. Connect the signal cables as described in the chapter
"Connecting the T8".
9.
The Tensiometer will respond to changes in the soil water
tension faster if there is no air inside the system and the soil
water conductivity is high.
10. Write down the serial number, position, installation angle and
depth.
11. Slide the supplied thermal insulation tube over the shaft end and
the refilling tubes. Bend the signal cable and lead it back through
the thermal tube.
12.
Protect the cables against rodent bites. Lead the cables through
plastic pipes or use the plastic protection tubes which are
available as an accessory.
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