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Fruit Dendrometer – Type DF2
Avoid any tension between the cable and sensor during handling and operation.
Pay attention to connections to data logger. Wrong connections will provide wrong readings.
4. Installation
Tools: Cable strap, spanner (M3), screw driver, and rope.
Depending on the type of fruits, there are 3 kinds of installation: small fruits, big fruits and
elongated fruits. The photos below show how the fruits are fastened to the dendrometer.
Generally, it must be ensured:
Tighten all screws firmly and the frame is stable.
The dendrometer bears the weight of fruit.
The cable does not pull on the sensor.
No rain water flows into the sensor.
The sensor rod is slightly pushed in by 2-3 mm.
5. Wiring and Logger Configuration
The dendrometer is compatible with most data loggers. In the following we describe the con-
nection with Dendrometer Logger (DL18), Campbell Logger (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.
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