Apogee Instruments TS-130 Manuel du propriétaire - Page 9
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DEPLOYMENT AND INSTALLATION
TS-100 fan-aspirated radiation shields come partially pre-assembled and has few parts, facilitating easy transport,
deployment, and maintenance.
Avoid placing the shield near buildings, paved surfaces, or any other locations which may create a micro-
environment significantly different than ambient environment. The World Meteorological Organization (WMO)
recommends a mounting height of 1.25 to 2 meters above ground. Air temperature typically decreases with
increasing height above the ground surface.
matches the shield's outer contour and will not come out when pulled. Look through the opening at the bottom of
the shield to verify that the thermistor tip is located concentrically in the middle of the airstream. If it is not,
remove the adapter and adjust the thermistor tip accordingly.
If desired, a humidity probe may be used with its accompanying sensor port adapter. If not pre-installed, slowly
insert the humidity probe into the adapter until the tip is in far enough to be centered in the air stream (about as
far as the included thermistor). If the o-rings bind or come lose, back out the probe, fix the o-ring positioning, and
retry. Rotating the humidity probe while inserting will help the o-rings stay in place. Additionally, the light use of a
lubricant, such as petroleum jelly, will greatly help humidity probe installation, and reduce risk of misplaced o-
rings. While installing the humidity probe, be sure not to put any unnecessary force on the neighboring pre-
installed thermistor cable; it has very thin internal wires which could easily break if handled incorrectly.
The underside of the hat has eight flat
surfaces where one or more included
cable tie mounts may affix. Using the
cable tie mounts is optional, but
provides an anchor to zip-tie cables to,
providing strain relief, extra shading of
cable, and a drip loop in the cable.
The shield is designed to hang from a standard IPS horizontal pipe
ranging from 1¼ inch (32 mm) to 2 inch (51 mm) in diameter. Attach
the hat to the pipe with the U-bolt, nuts, and rubber washers provided
(see diagram at left). Then, insert the shorter threaded end of the nylon
standoffs into the shield body. Once in place, align the other end of the
standoffs to the four corresponding holes in the hat and secure with
nylon nuts. Ensure that the sensor port (the hole in the side of the
shield where the air temperature and/or humidity probe mounts)
faces the nearest global pole (north for northern hemisphere, south
for southern hemisphere) to maximize shading of the lead wires.
When ordered with the TS-110, the ST-110 precision thermistor comes
fixed inside the desired sensor port adapter (an example is shown on
the next page). If not already installed, insert the adapter into the
sensor port (shown on next page) and rotate the adapter until it