Section 2. Weather Station Installation; Site Selection; Tools And Supplies; Tool Requirements - Campbell 012 Operator's Manual

SECTION 2. WEATHER STATION INSTALLATION

2.1 SITE SELECTION

The site, including its climate and topography,
should represent the general area being
measured. Also avoid man-made or natural
obstructions such as buildings, asphalt parking
lots, and trees. General sensor placement
guidelines are:
WIND SENSORS
Trees, buildings, or other structures can greatly
influence wind speed and direction
observations. As a rule of thumb, a structure
will disturb the air flow an upwind distance of
about twice the height of the structure; a
downwind distance of about six times the height
of the structure and a vertical distance of up to
twice the height of the structure. (Figure 2.1).
TEMPERATURE AND RELATIVE
HUMIDITY PROBE
The radiation shield provides protection from
direct sunlight and rain. The shield does not
protect against irrigation water which may be
sprayed up into the plates. If the RH chip goes
through wetting and drying cycles, the active
sensing material separates from the substrate,
damaging the sensor.
RAIN GAGE
Do not place the rain gage where it may catch
irrigation water. When possible, there should
be no obstructions in a 45
of the gage.
FIGURE 2.1. Effect of Structure on Wind Flow
o
line rising off the lip
SOLAR RADIATION
The pyranometer should be located so it is not
shadowed by surrounding objects.
TABLE 2.2-1. Tool Requirements
• sledgehammer
• open end wrench 3/4"
• trowel (for cement)
• tape measure
• dozen 16 penny nails
• wire strippers
• screw driver, regular head
• screw driver, phillips head
• screw driver, regular head thin blade

2.2 TOOLS AND SUPPLIES

An itemized list of weather station components
included in the shipment is found in the front of
the manual. Tables 2.2-1 and 2.2-2 list the
tools and supplies, respectively, required to
install the weather station.
TABLE 2.2-2. Materials Requirements for
Constructing Foundation
5 80 lb. sacks of sakrete
1 8' x 2" x 4" lumber
* 11" x 11" metal template
* 4 1/2" x 12" stainless steel anchor bolts
* 1" conduit elbow
1 1/4" diameter x 3 1/2' long pipe (solar
panel systems only)
*CSI supplied
• compass
• rag
• shovel
• flat metal file
• wheelbarrow
• level
• hammer
• wood saw
2-1