The situation may vary slightly from country to country, but this document is based on a country having one
national metrology institute (NMI) realising the newton in a number of national force standard machines,
and a number of calibration laboratories, generally accredited by their national accreditation body, using
force calibration machines to calibrate force-measuring instruments. These instruments may then be used
either to measure forces directly or to calibrate industrial force-generating equipment, such as tensile testing
machines.