Verification of measuring instruments in accordance with the regulatory documentation and the area of ​​laboratory accreditation, as well as other production requirements and regulations. Calculation of measurement uncertainty. Documentation management (in written and electronic form): verification log, verification schedules of measuring instruments and reference measuring instruments. Monitoring technical condition of reference measuring instruments, compliance with the schedule of maintenance and timely verification of reference measuring instruments. I have the certificates of the verifier on electrical measuring instrument, as well as on physico-chemical and opto-physical measuring instruments, thermotechnical measuring instruments.