Diameter Dendrometer Small - Type DD-S2
3
5. Wiring and Logger Configuration
The dendrometer is compatible with most data loggers. In the following we exemplify the
connection with Dendrometer Logger (DL18) and Campbell Logger (CR1000). Please
contact us if your logger is not described here, or if you should need further assistance.
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
Cable Color
Input Port
1
st
dendrometer
Yellow
1H
Green
Ground
Brown
Vx1
White
Ground
2
nd
dendrometer
Yellow
1L
Green
Ground
Brown
Vx1
White
Ground
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.
Differential Voltage Mode ( 2 dendrometers)
Connection
Cable Color
Input Port
1
st
dendrometer
Yellow
1H
Green
1L
Brown
Vx1
White
Ground
2
nd
dendrometer
Yellow
2H
Green
2L
Brown
Vx1
White
Ground
Program Syntax
ExciteV (Vx1,2500,0)
VoltDiff(DiffVolt(),2,mV2500,1,True,0,_50Hz,Mult(),Offs())
If Multiplier=4.4, 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.
