校正與測試實驗室能力的展現有兩個必要的途徑，一是獲得該區域之第三者 認證機構之認同，另一個便是積極參與能力試驗活動。各階層之實驗室均可藉由 此能力試驗活動來評估與證明實驗室的量測能力。能力試驗活動執行係按國際規 範「ISO/IEC 17043:2010 , Conformity assessment — General requirements for proficiency testing」要求，讓參與之實驗室間得以透過具公正性、專業性之比對活 動，瞭解本身之校正能力及與其他實驗室間之差異。工研院量測技術發展中心自 2008年第一次申請成為全國認證基金會（Taiwan Accreditation Foundation，TAF) 認可之能力試驗執行機構，陸續辦理塊規、電阻溫度計、法碼、電阻、電壓、電 流等具代表性之能力試驗活動至今。其中，溫濕度校正領域之TAF認可實驗室偏 少，直至2013年本中心終於成功舉辦溫濕度計校正之能力試驗，活動期間自2013 年5月10日至2013年9月27日結束，台灣共計14家TAF認可溫濕度校正實驗 室參與。參與本次能力試驗之實驗室之|En|均小於1 ,這顯示台灣溫濕度校正能力 相當一致，也充分展現溫濕度計校正技術已經相當純熟。

There are two ways to demonstrate the measurement capabilities owned by a laboratory. One is to get the accreditation by the third-party, and another is to attend the proficiency testing scheme. Proficiency Testing Provider needs to meet “ISO/IEC 17043:2010, Conformity assessment — General requirements for proficiency testing”. Since 2008, Center for Measurement Standards (CMS) was accredited by Taiwan Accreditation Foundation (TAF) to be a Proficiency Testing Provider and held many comparison activities such as Gauge Block, Resistance Thermometer, Weight, Resistant, Voltage, Current, etc. CMS held the proficiency testing of Hygrometer last year successfully to acquire the capability level of secondary laboratories. Via the measurement comparison schemes, the difference unfolds the measurement capabilities between secondary laboratories. Fourteen laboratories attended this Hygrometer Calibration Proficiency Testing, which was launched on May 10, 2013 and ended on September 27, 2013. CMS provided a calibrated hygrometer as a comparison sample in this testing. Each participant carried out the calibration according to its own calibration procedure. National Measurement Laboratory (NML) of Chinese Taipei was responsible for providing the assigned value and operating the stability testing. Results of this proficiency testing showed that all participants’ measurement performance are consistent with that of the reference laboratory, NML.