Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 5)

Table of Contents
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1. Preparation and Siting ................................................ 1
1.1 Siting and Exposure ............................................................................. 1
1.1.1 Wind Speed and Direction ............................................................ 1
1.1.2 Temperature and Relative Humidity ............................................. 1
1.1.3 Solar Radiation .............................................................................. 2
1.1.4 Soil Temperature ........................................................................... 2
1.2 Installation Tasks ................................................................................. 3
1.2.1 Indoors .......................................................................................... 3
1.2.2 Outdoors ........................................................................................ 5
1.3 Tools Required ..................................................................................... 5
1.3.1 Tools for Pole Installation ............................................................. 5
1.3.2 Tools for Instrumentation and Maintenance ................................. 5
1.4 Supplies for Power and Communications Options ............................... 6
1.5 Determining True North for Wind Vane Orientation ........................... 6
1.5.1 Web Calculator ............................................................................. 8
2. Hardware Installation ............................................... 10
2.1 Base Foundation ................................................................................. 11
2.1.1 Supplied Components ................................................................. 11
2.1.2 Installation................................................................................... 11
2.1.3 AC Power Installation ................................................................. 13
2.2 Tower/Pole ......................................................................................... 13
2.2.1 Supplied Components ................................................................. 13
2.2.2 Installation................................................................................... 13
2.2.3 Tower Grounding ........................................................................ 15
2.2.3.1 Supplied Components....................................................... 15
2.2.3.2 Grounding Procedure ....................................................... 15
2.3 Enclosure ............................................................................................ 16
2.3.1 Enclosure Installation .................................................................. 17
2.4 Crossarm and Sensor Installation ....................................................... 18
2.4.1 Components ................................................................................ 18
2.4.2 Crossarm Installation .................................................................. 18
2.4.3 RH and Temperature Radiation Shield ....................................... 19
2.4.4 034B Wind Sensor (Wind Sensor Option –MW) ........................ 20
2.4.5 Gill WindSonic 2-D Ultrasonic Wind Sensor (Wind Sensor
Option –GW) ........................................................................... 22
2.4.5.1 Changing the Jumper ........................................................ 22
2.4.5.2 Attachment to Sensor Arm ............................................... 24
2.4.6 Rain Gage.................................................................................... 26
2.4.7 Pyranometer ................................................................................ 27
2.4.8 107-LC or 108-LC Soil Temperature Sensor (Optional) ............ 28
2.4.9 CS616-LC Water Content Sensor (Optional) .............................. 28
2.4.9.1 Changing the Jumper ........................................................ 28
2.4.9.2 Site Installation ................................................................. 30
2.4.10 CS650-LC or CS655-LC Soil Water Content Sensor Plus
(Optional) ................................................................................ 31
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