皮带秤的计量控制项目与耐久性的测评方式

Metrological controls items and durability appraisal manners for belt weighers

鉴于皮带秤性能易变,皮带秤从定型到安装调试后正式启用以及日后长期使用的各个时期,其性能都需要时时处于有效监控之下。因此,皮带秤的计量控制手段也有型式评价、初始检定和后续检定、以及使用中核查等不同类型的项目。新版皮带秤国际建议O IML R 50:2014要求皮带秤的耐久性要在各个计量控制项目中得到评估。然而,国际建议并没有清晰阐明具体的耐久性测评试验程序与判据。文章对实施不同计量控制项目时的耐久性测评方式提出了相应的方法。

In view of the mutability of belt weighers’ performance, they must be under valid supervisory control throughout every period as finalize the design, put into formal use after be installation and trial run,and long-time use in days to come. Therefore there are various metrological controls means including type evaluation, initial verification, subsequent verification and in-service inspection. On OIML R50：2014,it is required that durability assessments shall be taken under every metrological controls items.However there are no explicit test procedure and criterion for durability appraisal in this International Recommendation. The different manner of durability appraisal under each category of metrological control item is put forward on this article.