对于5kg以上大天平的调修,尤其是换刀子后,天平的示值变动性的调修(即调整三刀刃在空间相互平行)尤为重要。本文对较大的天平,如:5kg、20kg、50kg、和1000kg等规格天平的平行性调整作一介绍。调整步骤是:(1)把精度较高的中刀承水准器放在中刀承上,调整水平;(2)把横梁放在支承架上,调整指针不跳针为止;(3)当天平空载与全载分度值调到接近一致时(空 For more than 5kg large balance adjustment, especially for the knife, the balance of the value of the changes in the repair (that is, adjust the three blades in space parallel to each other) is particularly important. This article on a larger scale, such as: 5kg, 20kg, 50kg, and 1000kg and other specifications balance parallel adjustment made an introduction. Adjustment steps are: (1) the accuracy of the knife bearing level on the knife bearing, adjust the level; (2) the beam on the support frame, adjusting the pointer does not jump so far; (3) when the balance No-load and full load index adjusted to nearly the same (empty