Specifications

ET107 Weather Station
Table of Contents
PDF viewers note: These page numbers refer to the printed version of this document. Use
the Adobe Acrobat® bookmarks tab for links to specific sections.
1. Preparation and Siting .............................................1-1
1.1 Siting and Exposure.............................................................................. 1-1
1.1.1 Wind Speed and Direction.......................................................... 1-1
1.1.2 Temperature and Relative Humidity........................................... 1-1
1.1.3 Solar Radiation............................................................................ 1-2
1.1.4 Soil Temperature......................................................................... 1-2
1.2 Installation Tasks.................................................................................. 1-3
1.2.1 Indoors ........................................................................................ 1-3
1.2.2 Outdoors...................................................................................... 1-5
1.3 Tools Required ..................................................................................... 1-5
1.3.1 Tools for Pole Installation........................................................... 1-5
1.3.2 Tools for Instrumentation and Maintenance............................... 1-5
1.4 Supplies for Power and Communications Options............................... 1-6
1.5 Determining True North for Wind Vane Orientation........................... 1-6
1.5.1 NSSDC CGM Service................................................................. 1-7
2. Hardware Installation ...............................................2-1
2.1 Base Foundation ................................................................................... 2-2
2.1.1 Supplied Components................................................................. 2-2
2.1.2 Installation .................................................................................. 2-2
2.1.3 AC Power Installation................................................................. 2-4
2.2 Tower/Pole............................................................................................ 2-4
2.2.1 Supplied Components................................................................. 2-4
2.2.2 Installation .................................................................................. 2-4
2.2.3 Tower Grounding........................................................................ 2-6
2.2.3.1 Supplied Components ....................................................... 2-6
2.2.3.2 Grounding Procedure ........................................................ 2-6
2.3 Enclosure .............................................................................................. 2-7
2.3.1 Enclosure Installation.................................................................. 2-7
2.4 Crossarm and Sensor Installation ......................................................... 2-8
2.4.1 Components ................................................................................ 2-8
2.4.2 Crossarm Installation .................................................................. 2-8
2.4.3 RH and Temperature Radiation Shield ..................................... 2-10
2.4.4 034B Wind Sensor (Wind Sensor Option –MW) ..................... 2-11
2.4.5 Gill WindSonic 2-D Ultrasonic Wind Sensor (Wind Sensor
Option –GW) .......................................................................... 2-13
2.4.5.1 Changing the Jumper....................................................... 2-13
2.4.5.2 Attachment to Sensor Arm.............................................. 2-15
2.4.6 Rain Gage ................................................................................. 2-17
2.4.7 Pyranometer.............................................................................. 2-18
2.4.8 107-LC or 108-LC Soil Temperature Sensor (Optional).......... 2-19
i