ISO 655:1980 Preview
Long enclosed-scale thermometers for precision use
The requirements specify a series of liquid-in-glass enclosed-scale thermometers, not exceeding 375 mm in length for accurate measurement of temperature. The combination of letters and figures allocated to each thermometer of the series indicating the type is given. Temperature scale, materials, construction, markimg, and accuracy are specified. The annex deals with a method of determing change in the zero indication.