The state shall supply the Department of Transportation and Public Facilities with a duplicate set of state standards of weight and measure, referred to in this chapter as office standards. The state shall supply field standards and the equipment that is necessary to carry out this chapter. The office standards and field standards shall be verified upon their initial receipt and at least once each year afterward. The office standards shall be verified by direct comparison with the state standards. The field standards shall be verified by comparison with the office standards.