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Diameter Dendrometer Large – Type DD-L2
5. Wiring and Logger Configuration
The dendrometer is compatible with most data loggers. In the following we describe the
connection 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 den-
drometers in single-ended mode, but only 8 dendrometers in differential mode.
Single-ended Voltage Mode ( 2 dendrometers)
Connection
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.
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=10.16, 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.
Cable Color
Yellow
Green
Brown
White
Yellow
Green
Brown
White
Cable Color
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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