i
Contents
Safety Instructions ....................................................... S-1
S.1 Local Safety Regulations...................................................................... S-1
S.2 Selecting a Site for the Weather Station................................................ S-1
S.3 Before Assembly .................................................................................. S-2
S.4 Do Not Climb the Tower...................................................................... S-2
S.5 Maintenance........................................................................................ .. S-2
S.5.1 Structure ....................................................................................... S-2
S.5.2 Electrical.......................................................................................... S-2
Introduction.....................................................................I-1
I.1 Choosing the Location for Your AWS ................................................. I-1
I.2 The Effects of Varying Environmental Conditions ............................... I-2
I.2.1 The Clothesline Effect ................................................................ I-2
I.2.2 The Leading Edge Effect ........................................................... I-2
I.2.3 The Oasis Effect.......................................................................... I-2
I.3 Obstructions........................................................................................... I-3
I.4 The Effects of an Urban Environment................................................... I-3
I.5 Checking and Preparation...................................................................... I-3
Section 1. Site Preparation and Assembly of the
Tower.................................................... 1-1
1.1 Introduction........................................................................................... 1 -1
1.2 Description............................................................................................ 1-3
1.2.1 Guying......................................................................................... 1 -3
1.3 Tower Specifications ............................................................................ 1 -3
1.3.1 Accessories.................................................................................. 1-3
1.4 Site Preparation..................................................................................... 1-4
1.5 Base Installation.................................................................................... 1-4
1.5.1 Base Installation .......................................................................... 1-4
1.5.2 Special RFM18 Base Installation................................................ 1-5
1.5.3 Lightning Protection for Roof Mounted Towers......................... 1-6
1.6 Ground Anchor Layout (for Optional Guying Kit)............................... 1-7
1.6.1 Ground Anchor Installation......................................................... 1-7
1.7 Tower Assembly ................................................................................... 1-8
1.8 Fitting AWS Components and Erecting the Tower .............................. 1-9
