The maximum permissible error when the working frequency of resistor is equal to or lower than the measurement frequency 電阻箱的工作頻率等于或低于測試頻率上限時的最大允許誤差。
And lower from 20 kg to 50 kg . the classification of weights depends on their maximum permissible errors ( refer to the following table ) , shape , material , construction and surface finish , as described in the international recommendation r111 - ( weights of classes e 本所可為由1毫克至10千克的國際法制計量組織( internationalorganisationoflegalmetrology ) ( oiml ) e2級別及以下的標準砝碼及20千克至50千克的f1級別及以下的標準砝碼提供校正服務。