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metrology, after the Convention of the Meter was signed in 1875. The
Swiss accreditation service (SAS) sets the examinations and delivers
the accreditations in all the fields covered by the European or
international standards in relation with accreditation and, in particular,
in all the domains of metrology (Swiss Calibration Service – SCS). In
order that correct values of units be disseminated with the required
accuracy, Swiss metrology has set up traceability chains that
guarantee the traceability of physical quantities, and of some chemical
quantities such as gas mixtures. These chains originate from the
METAS’s primary laboratories which materialize the units in
accordance with their definition and transmit them to the METAS’s
calibration laboratories through material standards. These calibration
laboratories calibrate the standards of the clients.

III Answer the questions:
1 What does international coherence mean?
2 What does a national organization do?
3 What is metrology system based on in Italy?
4 What is the federal government responsible for in Switzerland?
5 When was the convention of the meter signed?
6 What does the Swiss accreditation service do?

IV Fill in the blanks with appropriate words:
1 … has to be ensured at the international and 1 verification
national level. 2 coherence
2 National coherence mirrors international 3 calibration
coherence, although each has its own … 4 national
3 As any system … there is a need for a standards
periodic follow up in the field. 5 drift
4 … metrology is the business of cantons. 6 legal
5 The cantons have set up in offices to carry out
the tasks.
6 These … laboratories calibrate the standards
of the clients.

V Give English equivalents of the following:
1 успіх метричної системи
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