Campbell Scientific 43347 RTD Temperature Probe and 43502 Aspirated Radiation Shield - Manual (Page 9)

43347 RTD Temperature Probe, 43502 and 41003-5 Radiation Shields
Accuracy: ±0.3°C at 0° C
±0.1°C with NIST calibration
Temperature
Coefficient: .00375
Ω/Ω/°C
3. Installation
3.1 Siting
Sensors should be located over an open level area at least 9 m (EPA) in
diameter. The surface should be covered by short grass, or where grass does
not grow, the natural earth surface. Sensors should be located at a distance of
at least four times the height of any nearby obstruction, and at least 30 m
(EPA) from large paved areas. Sensors should be protected from thermal
radiation, and adequately ventilated.
Standard measurement heights:
1.5 m +/- 1.0 m (AASC)
1.25 to 2.0 m (WMO)
2.0 m (EPA)
2.0 m and 10.0 m temperature difference (EPA)
3.2 Assembly and Mounting
Tools Required:
• 1/2 in. open end wrench
• small screw driver provided with datalogger
• small Phillips screw driver
• UV resistant cable ties
• small pair of diagonal-cutting pliers
3.3 43502 Radiation Shield Installation
The 43502 mounting bracket has a U-bolt configured for attaching the shield to
a vertical tripod mast or tower leg up to 2” in diameter. By moving the U-bolt
to the other set of holes, the bracket can be attached to a CM200-series
crossarm, e.g., the CM204. The CM204 crossarm includes the CM210
Mounting Kit for attaching the crossarm to a tripod mast or tower leg. For
triangular towers (e.g., the UT30), an additional pn CM210 Crossarm
Mounting Kit can be ordered for attaching the crossarm to two tower legs for
additional stability.
Attach the 43502 to the tripod/tower or crossarm using the U-bolt. Tighten the
U-bolt sufficiently for a secure hold without distorting the plastic v-block. See
the drawings in Appendix B, 43502 Aspirated Radiation Shield, for reference
to names and locations of shield components and position of sensor within the
shield.
The blower cover is hinged to allow easy access for sensor installation and
cable connections. Loosen the captive screw in the blower cover to open. The
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