Regulations on the Calibration of the Observation Instruments of Exclusive Observation Stations Article 15

This Regulations shall become effective on the date of promulgation.Criteria for accreditation of the observation instrumentsA. Atmospheric Pressure Measuring InstrumentUnit : hectopascal（Symbol : hPa）Types of InstrumentMeasuring Range Maximum Permissible ErrorPrecision MercurialBarometer866~1050hPa（650~787mmHg）±0.33hPa（±0.25mmHg）Fortin-type MercurialBarometer866~1050hPa（650~787mmHg）±0.67hPa（±0.5mmHg）Aneroid Barometer866~1050hPa（650~787mmHg）±0.67hPa（±0.5mmHg）Aneroid Barograph866~1050hPa（650~787mmHg）±1.33hPa（±1.0mmHg）Electronic Barometer866~1050hPa（650~787mmHg）±0.67hPa（±0.5mmHg）B. Temperature Measuring InstrumentUnit : degree Celsius（Symbol : ℃）Types of InstrumentMinimal Scale/Name Measuring Range（℃） Maximum Permissible Error （℃）Glass-tubeThermometernterval≦1/5℃－50~－20 ± 0.5痋?0 ~100 ± 0.3nterval≧1/2℃－20 ~＋40 ± 0.3?0~100 ± 0.5hermometerin Iron Tube≦－20 ± 0.5痋?0 ± 0.3aximumThermometer＜0 ± 0.5~ 50 ± 0.3inimumThermometer＜－40 ± 1.0?0 ~－20 ± 0.5痋?0 ± 0.3MetallicThermometerThermograph －20 ~＋40 ± 0.5hermometer ± 0.5ElectronicThermometerThermograph －20 ~＋40 ± 0.5hermometer ± 0.5C. Humidity Measuring InstrumentUnit：percentage （Symbol：% RH）Types of InstrumentMeasuring Range（% RH）Maximum PermissibleError （% RH）Hygrometer and/orHygrograph0 ~ 100 ± 5D. Precipitation Measuring InstrumentUnit：milli-meter （Symbol：mm）Types of InstrumentMaximum Permissible Error（%）Rain Gage± 0.3Tipping-bucket Rain GagePrecipitation ± 3E. Wind-direction Measuring InstrumentUnit：degreeTypes of InstrumentMeasuring Range（degree）Maximum PermissibleError（degree）AnemometerorAnemometrograph0 ~ 360± 5F. Wind-speed Measuring InstrumentUnit：meter per second （Symbol：m/s）Types of InstrumentMaximum PermissibleError（%）Propeller-typeAnemometer/Anemometrograph± 5Three/four cup-typeAnemometer/Anemometrograph± 5G. Sunshine-duration Measuring InstrumentUnit：hours （Symbol：h） a. Minimum threshold：120W/m2 b. Maximum Permissible Error：± 0.1hH. Solar-radiation Measuring InstrumentUnit：watts per square meter （Symbol：W/m2） Maximum Permissible Error：± 5%