LI-COR LI-8100A - Page 38

2-16
Initial Setup
V1
V IN
10.5-28VDC
3A MAX
V OUT
5VDC
30mA
V OUT
5VDC
30mA
SWITCHED
V2
Red
White (excitation)
V3 V4 T1 T2 T3 T4
+
GND
+
GND
+
GND
+
GND GND GND
+
-
+
-
+
-
+
-
+
-
+
-
+
-
Bare (ground)
ECH
2
O EC-5 Moisture Sensor
Figure 2-14. ECH
2
O EC-5 soil moisture probe connection to Auxiliary Sensor Interface.
The 8100-203 Soil Temperature Thermistor Probe kit consists of a Soil
Temperature Thermistor Probe (p/n 81 50-203) and a Probe Adapter (p/n 9981-150)
that mates to the Soil Temperature Thermistor Probe; the Probe Adapter contains a
resistor that allows the 8150-203 Soil Temperature Thermistor Probe to be used
with the Auxiliary Sensor Interface on the LI-8100A Automated Soil CO
2
Flux
System. The 8100-203 is terminated with bare wires for connection to the
Auxiliary Sensor Interface; the soil temperature probe must be set up in software.
The wire connections are shown below.
V1
V IN
10.5-28VDC
3A MAX
V OUT
5VDC
30mA
V OUT
5VDC
30mA
SWITCHED
V2
Red
(0-5VDC+)
Orange
(V OUT 5VDC+)
9981-150 Soil Temperature
Probe Adapter
V3 V4 T1 T2 T3 T4
+
GND
+
GND
+
GND
+
GND GND GND
+
-
+
-
+
-
+
-
+
-
+
-
+
-
Black (ground)
Figure 2-15. 8100-203 soil temperature thermistor probe connection to Auxiliary Sensor
Interface.