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Fruit Dendrometer – Type DF2
Single-ended Voltage Mode ( 2 dendrometers)
Differential Voltage Mode ( 2 dendrometers)
An interval 0.5-hour for data collection can reveal the diurnal course of diameter changes very
well.
5. Adjustment and maintenance
Fruits usually grow very fast, the diameter can grow to 0.5 mm per day. It is therefore very im-
portant to pay attention to the reset of the sensor. When the output approaches 25 mm, the
sensor needs to be reset. Relax the screws and let the sensor again at the position where the
sensor is pushed in about 2-3 mm.
6. An Example of measured data
The figure shows the diameter changes of a apple measured with an Ecomatik fruit dendrome-
ter.
Connection
Cable Color
st
1
dendrometer
nd
2
dendrometer
Program Syntax
ExciteV (Vx1,2500,0)
VoltSe(SEVolt(),2,mV2500,1,True,0,_50Hz,Mult(),Offs())
If Multiplier=10.16, Offset=0, the results are measured in microns.
Connection
Cable Color
st
1
dendrometer
nd
2
dendrometer
Program Syntax
ExciteV (Vx1,2500,0)
VoltDiff(DiffVolt(),2,mV2500,1,True,0,_50Hz,Mult(),Offs())
If Multiplier=10.16, Offset=0, the results are measured in microns.
Yellow
Green
Brown
White
Yellow
Green
Brown
White
Yellow
Green
Brown
White
Yellow
Green
Brown
White
3
Input Port
1H
Ground
Vx1
Ground
1L
Ground
Vx1
Ground
Input Port
1H
1L
Vx1
Ground
2H
2L
Vx1
Ground
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