Campbell KH20, Product Manual

Page: 27 / 64

Appendix C. EasyFlux
®
DL CR6KH20
C-9
TABLE C-9. Default Wiring for Precipitation Gage
Sensor Quantity Wire Description Color
CR6 Terminal
TE525MM
Tipping Rain
Gage
0 or 1
Pulse Output Black U12
Signal Ground White
⏚
Shield Clear
⏚
C.2.3.8 Soil Temperature
The TCAV is an averaging soil thermocouple probe used for measuring soil
temperature. EasyFlux DL CR6KH20 can support up to three TCAV probes.
The order of wiring, however, is important. If only one TCAV sensor is used, it
must be wired as described for TCAV #1 in TABLE C-10 . A second or third
TCAV sensor would be wired according to TCAV #2 or TCAV #3,
respectively, in TABLE C-10 .
If only one TCAV is being used and it is wired according to
TCAV #2 or #3, the data logger will not record any TCAV
measurements.
TABLE C-10. Default Wiring for Soil Thermocouple Probes
Sensor Quantity Wire Description Color
VOLT116 Terminal
TCAV #1 1
Signal Purple Diff 1H
Signal Reference Red Diff 1L
Shield Clear ⏚
TCAV #2 1
Signal Purple Diff 2H
Signal Reference Red Diff 2L
Shield Clear
⏚
TCAV#3
1
Signal Purple
Diff 3H
Signal Reference Red
Diff 3L
Shield Clear ⏚
The CS650 or CS655 sensors also measure soil temperature. If the
CS650 or CS655 sensors are used but no TCAV probes are used,
EasyFlux DL CR6KH20
will use soil temperature from the CS650
or CS655 to compute ground-surface heat flux. If available, soil
temperature from the TCAV probe is preferred since it provides a
better spatial average. See wiring details for these sensors in
TABLE C-11 .
C.2.3.9 Soil Water Content
EasyFlux DL CR6KH20 supports one of two models of soil water content
sensors: the CS650 or CS655; up to three of one model is supported. A soil
CAUTION
NOTE