When used in the field, the TempVue 20 SDI-12 must be housed in a radiation shield. Compatible
radiation shields include the RAD06, RAD10E, and RAD14 unventilated radiation shields and the
TS100SS fan-aspirated radiation shield. The white color of these shields reflects solar radiation.
The unventilated radiation shields have a louvered construction that allows air to pass freely
though, thereby keeping the sensor at or near ambient temperature. The RAD06, RAD10E, and
RAD14 have a double-louvered design that offers improved sensor protection from insect
intrusion and driving rain and snow. In addition, compared to shields of a similar appearance, the
RAD shields have lower self-heating in bright sunlight combined with low wind speeds giving a
better measurement. The RAD shields attach to a crossarm, mast, or user-supplied pipe with a 2.5
to 5.3 cm (1.0 to 2.1 inch) outer diameter.
The Apogee Instruments aspirated TS100SS shield can also be used where minimal solar errors
and a fast speed of response is desired. It mounts on a crossarm or horizontal pipe (1-1/4 inch to
2 inch IPS).
Tools required for installing a radiation shield to a tripod or tower include:
l
adjustable wrench (to suit 12 mm (1/2 in) nuts)
l
small screwdriver provided with data logger
l
small Phillips screwdriver
l
UV-resistant cable ties
l
small pair of diagonal-cutting pliers
l
adjustable wrench with a minimum 50 mm (2 in) jaw size.
7.4 Installation in a radiation shield
1. If using a 10- or 14-plate shield, attach the shield extender.
2. If using a RAD06, RAD10E, or RAD14 shield, loosen the nut on the entry gland at the bottom
of the shield.
TempVue 20 SDI-12 PT-100 Class A, Precision Air Temperature Sensor
11
