Hand-held weather equipment

Use of portable weather stations and hand-held weather equipment at the field laboratory... 

All equipment to be used at the field site should be calibrated at or near the field laboratory or field site prior to the application of the test substance (pesticide product). Most weather equipment will have been calibrated at the manufacturer and can be checked for functionality prior to the worker exposure/re-entry test by comparing weather readings from the nearest airport or National Oceanic and Atmospheric Administration (NOAA) weather reporting station with the weather readings compiled by the portable weather station. Hand-held weather instmments could also be checked with current weather reading from local airports or NOAA facilities. 

The main equipment is obviously the human eye and brain, aided with a notebook, pro forma or hand-held computer and a camera. Binoculars may be necessary, but close inspection is better if access can be arranged. A systematic visual survey will be planned in advance. Many companies that carry out condition surveys will have standardized systems for indicating the nature and extent of defects. These are used in conjunction with customized pro formas for each element or face of the structure. It is normal to record date, time and weather conditions when doing the survey, also noting visual observations such as water or salt run down and damp areas. Examples are given in Figures 4.1 and 4.2. 

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