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Fruit Dendrometer – Type DF6
!! IMPORTANT !!
Fix the cable onto the tree stem/branch so that the sensor is protected from any acci-
dental pull/ drag of the entire cable length. This can be done using a rope or cable
straps. In addition, there should be no tension between the sensor and cable.
Ensure that no rain water can run along the cable, or the sensor rod and enter the sen-
sor casing. Rod entrance, as well as wire outlet should hence always be inclined
downwards.
5. Wiring and Logger Configuration
The dendrometer is compatible with most data loggers.
Wiring as single-ended voltage measurement:
4-wire connection
(cable type: 4-wires + shield)
Single-ended Voltage
Cable Color
Yellow
Green
Brown
White
Black
An interval 0.5-hour for data collection can reveal the diurnal course of diameter changes very
well.
In the following we describe the connection with Dendrometer Logger (DL18), Campbell Log-
ger (CR1000). Please contact us if your logger is not described here.
Dendrometer Data Logger (DL18)
The DL18 is a battery powered, waterproof logger for connecting 4 dendrometers. It is a very
effective data logger for dendrometer measurement under outdoor conditions. For details
please see the user manual of the DL18.
Campbell Data Logger (CR1000)
The dendrometer can be measured both in single-ended voltage as well as differential voltage
mode. Differential voltage mode provides better accuracy. But single-ended mode requires half
as many channels as differential mode. One CR1000 can include 16 dendrometers in single-
ended mode, but only 8 dendrometers in differential mode.
Differential Voltage
Input Port
Cable Color
H (Signal, Vout +)
Yellow
GND
Green
Vex
Brown
GND
White
GND
Black
Input Port
H (Signal, Vout +)
L (Signal, Vout -)
Vex
GND
GND
3
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