Campbell Scientific 43347 RTD Temperature Probe and 43502 Aspirated Radiation Shield - Manual (Page 32)

Appendix C. 43347 Aspirated Radiation Shield
The 43408 radiation shield employs concentric downward facing intake tubes
and a small canopy shade to isolate the temperature probe from direct and
indirect radiation. The 43347 temperature probe mounts vertically in the center
of the intake tubes.
A brushless 12 Vdc blower motor pulls ambient air into the shield and across
the temperature probe to reduce radiation errors. The blower operates off a 115
Vac/12 Vdc transformer that is included with the shield.
C.1 Specifications
43408 ASPIRATED RADIATION SHIELD:
DIMENSIONS:
Length: 44 in, extendable to 75 in
Diameter of Blower Housing: 6 in
AIR FLOW RATE:
3 to 7 m/s depending on sensor size
TEMPERATURE RANGE: ±50°C
POWER REQUIRED:
12 to 14 Vac @ 420 to 480 mA
115 Vac/12 Vdc - 800 mA transformer supplied
RADIATION ERROR:
< 0.2°C radiation @ 1100 W/m 2 irradiance
LIFE EXPECTANCY ON BLOWER:
80,000 hrs @ 25°C
43347 Temperature Probe
and Junction Box
Blower Housing
43408 Aspirated
Radiation Shield
FIGURE C-1. 43347 RTD Temperature Probe and 43408 Aspirated
Radiation Shield
C-2