1.4　Tests of Tools and Instruments for Live Workin...

Tests of tools and instruments for live working include electrical test and mechanical test.Regular electrical and mechanical tests must be carried out for any type of tools and instruments for live working to check whether they meet specified electrical performance indexes and mechanical strength.Only through the above two tests can we make the conclusion whether they are qualified or not.Defects that can not be observed may be produced or left during production,transportation and storage of tools and instruments,and only through tests can they be exposed,so the test of tools and instruments for live working is the only reliable means to check whether the tools and instruments are qualified.(https://www.daowen.com)