Campbell UT20 Product Manual
Also see for UT20: Instruction manualProduct manualInstruction manual
                             | |
Contents
| 
UT20 and UT30 Universal Towers44.2 Temperature and Relative HumiditySensors should be located over an open, level area at least 9 m (EPA1) indiameter. The surface should be covered by short grass, or, where grass doesnot grow, the natural earth surface. Locate sensors at a distance of at least fourtimes the height of any nearby obstructions and at least 30 m (EPA1) frompaved areas. Sensors must be protected from thermal radiation and adequatelyventilated.Situations to avoid include:• Industrial heat sources• Rooftops• Steep slopes• Sheltered hollows• Tall vegetation• Shaded areas• Swamps• Areas where snow drifts occur• Low places holding standing water after rainstormsStandard measurement heights:• 1.5 m ± 1.0 m (AASC)• 1.25 to 2.00 m (WMO)• 2.0 m temperature (EPA)• 2.0 m and 10.0 m for temperature difference (EPA)4.3 PrecipitationRain gages must be sited on level ground covered with short grass or gravel. Inopen areas, choose a site where the distance to any obstruction is two to fourtimes (EPA, AASC) the height of the obstruction.Position the height of the opening as low as possible, but high enough to avoidsplashing from the ground. Wind shields, such as Campbell Scientific’s260-953 Alter-Type Rain Gage Wind Screen, are recommended for open areas.When necessary, use heated collectors to properly measure frozenprecipitation. The gage must be mounted above the average level of snowaccumulation in areas that experience significant snowfall.Standard measurement heights:• 1.0 m ± 1.0 cm (AASC)• 30.0 cm minimum (WMO, EPA) |
Related manuals for Campbell UT20
manualsdatabase
Your AI-powered manual search engine