Apogee Instruments TS-220 Kullanıcı El Kitabı - Sayfa 10

Güvenlik Ekipmanları Apogee Instruments TS-220 için çevrimiçi göz atın veya pdf Kullanıcı El Kitabı indirin. Apogee Instruments TS-220 20 sayfaları. Fan-aspirated radiation shield

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DEPLOYMENT 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