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Diameter Dendrometer Large – Type DD-L1
Differential Voltage Mode ( 2 dendrometers)
Connection
st
1
dendrometer
nd
2
dendrometer
Program Syntax
ExciteV (Vx1,2500,0)
VoltDiff(DiffVolt(),2,mV2500,1,True,0,_50Hz,Mult(),Offs())
If Multiplier=4.4, Offset=0, the results are measured in microns.
An interval 0.5-hour for data collection can reveal the diurnal course of diameter changes very well.
6. Adjustment and maintenance
Ensure that no falling branches, fruits or snow land on the sensor. The sensor is protected
against water droplets but is not waterproof.
When the sensor is correctly installed, it will function under outdoor conditions without the
need for further maintenance.
Depending on the growth rate of the tree, the sensor should be reset after some months
or years of measurements. When the output approaches 11 mm, the sensor needs to be
reset.
Relax the screw slowly so that the sensor rod is pushed in by about 2-3 mm. When the
reset is taking place shortly before frost period, the sensor rod should be pushed in by 5
mm. At frosts the stem diameter can shrink considerably.
Tighten all screws firmly.
Cable Color
Yellow
Green
Brown
White
Yellow
Green
Brown
White
4
Input Port
1H
1L
Vx1
Ground
2H
2L
Vx1
Ground
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