5 working days. If the verification is passed, a verification certificate will be issued; if the verification is not qualified, a verification result notification will be issued. [Commitment time limit] After accepting the application, the verification work will be completed within 5 working days. The scope of measuring instruments subject to compulsory verification includes two parts. One is measurement standards, which are public measurement standards in society and the highest measurement standards used by departments, enterprises and institutions; second is work measuring instruments, which are directly used for trade settlement, safety protection, and medical treatment. Work measuring instruments listed in the "Catalogue of Work Measuring Instruments Compulsorily Verified by the People's Republic of China and the State" for health and environmental monitoring.