The maximum permissible error when the working frequency of resistor is equal to or lower than the measurement frequency 电阻箱的工作频率等于或低于测试频率上限时的最大允许误差。
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 本所可为由1毫克至10千克的国际法制计量组织( internationalorganisationoflegalmetrology ) ( oiml ) e2级别及以下的标准砝码及20千克至50千克的f1级别及以下的标准砝码提供校正服务。