Tham khảo tài liệu 'specifications, tolerances, and other technical requirements for weighing and measuring devices episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . Farm Milk Tanks Handbook 44 - 2007 . Design of Indicating Means. . General. - A tank shall include indicating means and shall be calibrated over the entire range of the volume of the tank from 5 of capacity or 2 m3 500 gal whichever is less to its maximum capacity. Nonretroactive as of January 1 1986 Added 1985 . Gauge-Rod Bracket or Supports. - If a tank is designed for use with a gauge rod a substantial and rigid gauge-rod bracket or other suitable supporting elements for positioning the gauge rod shall be provided. A gauge rod and its brackets or other supporting elements shall be so constructed that whenever the rod is placed in engagement with the bracket or supports and released the rod will automatically seat itself at a fixed height and in a vertical position. When a gauge rod is properly seated on its brackets or supports there shall be a clearance of at least cm 3 in between the graduated face of the rod and any tank wall or other surface that it faces. . Gauge Rod. - When properly seated in position a rod shall not touch the bottom of the tank unless this is required by the design of the supporting elements. The rod shall be graduated throughout an interval corresponding to the volume range within which readings of liquid level are to be made. . Surface-Gauge Bracket or Supports. - If a tank is designed for use with a surface gauge a substantial and rigid surface-gauge bracket or other suitable supporting elements for positioning the surface gauge shall be provided. A surface gauge and its brackets or other supporting elements shall be so constructed that whenever the gauge assembly is placed in engagement with the bracket or supports the indicator if not permanently mounted on the tank will automatically seat itself in correct operating position and the graduated element will be vertically positioned and will be securely held at any height to which it may be manually set. . Surface Gauge. - When properly engaged .
