電子吊秤是非自動衡器的一類，主要由吊鉤、稱重傳感器、吊環、指示裝置 以及連接部件組成。被測物體下掛在吊鉤上，在平衡狀態，稱量物體的質量，與其它非自動衡器相較之下，它是不同的負載模型。 電子吊秤的型式評價依據的是國際建議標準砝碼規範R76，稱重測試程序之 原理是從小至最大質量逐級加載，然後再逐級卸載。當吊秤的最大容量為30噸或 50噸，其難以通過完整的測試單元。 電子吊秤專用計量測試裝置於2011年在浙江省計量科學研究院開始建設，其 最大測量範圍是30噸，該裝置具有如下的特徵：可實現旋轉測試、高低溫測試、 穩態濕熱測試、逐級加載和逐級卸載，符合國際標準砝碼規範R76要求。

Crane scale is one kind of NAWI (non-automatic weighing instruments), which has a representative character of weighing in motion with other device, such as traveling crane. Crane scale is composed of hook, load cell, shackle, interconnecting piece and display unit. The mass is connected with hook, under the crane scale, it is different loading model compared with other NAWI, and for example the mass is loading up the platform scale. The testing method of crane scale is based on OIML R76; the principle in test process is loading from small mass to maximum mass, and unloading from maximum mass to small mass. Now, the maximum capacity of crane scale is 30t or 50t, it is hard to test by complete unit. Special equipment for crane scale is built from 2011 with maximum mass of 30t in Zhejiang province, which has following characters: rotating testing; temperature testing; temperature and humidity testing; loading and unloading of stepped construction; conforming OIML R76.