Advertisement
Fruit Dendrometer – Type DF5
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.
Single-ended Voltage Mode ( 2 dendrometers)
Connection
st
1
dendrometer
nd
2
Program Syntax
ExciteV (Vx1,2500,0)
VoltSe(SEVolt(),2,mV2500,1,True,0,_50Hz,Mult(),Offs())
If Multiplier=4.4, Offset=0, the results are measured in microns.
Input Port
H (Signal, Vout +)
GND
Vex
GND
GND
Cable Color
Yellow
Green
Brown
White
dendrometer
Yellow
Green
Brown
White
Differential Voltage
Cable Color
Input Port
Yellow
H (Signal, Vout +)
Green
L (Signal, Vout -)
Brown
Vex
White
GND
Black
GND
Input Port
1H
Ground
Vx1
Ground
1L
Ground
Vx1
Ground
3
Advertisement
