BS ISO 17714:2007

Foreword
Introduction
1 Scope
2 Terms and definitions
3 Field test conditions
   3.1 Field test site
   3.2 Respective location of screens
   3.3 Screens
   3.4 Thermometers
   3.5 Additional meteorological variables
   3.6 Data sampling
   3.7 Reference values
   3.8 Quality control
   3.9 Long-term intercomparison
   3.10 Typical conditions
   3.11 Documentation
4 Field test methods
   4.1 Comparability analysis
   4.2 Global analysis of air temperature
   4.3 Analysis of extreme values
   4.4 Statistical analysis of radiation error
   4.5 Influence of surface albedo
   4.6 Selection of typical conditions
5 Measurement of screen characteristics
   5.1 Aspiration rate
   5.2 Internal ventilation factor
   5.3 Representative height and screen reference point
   5.4 System response time
Annex A (informative) Influence factors
Annex B (informative) Examples of useful test-report graphs
Bibliography

Defines characteristics of a thermometer shield/screen. It also defines test methods to inter-compare the behaviour of different screen designs.

This International Standard defines characteristics of a thermometer shield/screen. It also defines test methods to inter-compare the behaviour of different screen designs.

Although screens are usually used for both air temperature and humidity measurements, this International Standard is applicable only to temperature measurements.

Both naturally and artificially ventilated screens are considered.