TS 293

TS 293 is a withdrawn standard dealing with the base quantities and units of the International System of Units (SI). In general technical terms, this subject provides the common measurement language used across engineering, science, trade, and laboratory work: the core quantities from which all other derived quantities are built, such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.

Why base quantities and units matter

In measurement practice, base quantities are the foundation for all derived quantities. Speed, force, pressure, energy, and power are all expressed through combinations of base units, which makes the system coherent and practical for technical calculations. The SI framework therefore supports consistency in technical documentation, manufacturing, quality control, and comparison of results across different fields.

The title shows that this standard focuses on the core SI structure. Its withdrawal and replacement by TS 294, TS 295, TS 296, and TS 297 indicate that the subject was later reorganized into separate standards, but this record alone does not confirm the detailed content of those later documents or the exact clause-by-clause coverage of TS 293.

General technical context

• Base quantities are the starting point of a measurement system; derived quantities are formed from them.
• Units allow measured values to be expressed numerically in a consistent way across disciplines.
• The SI approach is built on systematic and compatible use of units.
• Standards of this kind provide a shared reference for technical documents, engineering calculations, and comparison of measurements.