Apogee Instruments TS-220 Panduan Pemilik - Halaman 10
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Halaman CetakDEPLOYMENT AND INSTALLATION
TS-200 fan-aspirated radiation shields come partially pre-assembled and has few parts, facilitating easy transport,
deployment, and maintenance.
stops. 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 into the adapter while inserting it 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.
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.
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, screw an end of the threaded rods into the shield body. Place the
cylinder spacers onto the threaded rods to create the standoffs. 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-210, the ST-110 precision thermistor comes fixed
inside the desired sensor port adapter. If not already installed, insert the
adapter into the sensor port (shown below) and push the adapter in until it