under national calibration bodies can only issue accredited calibration
certificates, and for Europe those bodies are again member of EA.
EA - European co-operation for Accreditation www.european-accreditation.org.
All accredited certificate have the rights to use the national logo
for accreditation on the front page of the certificate. For Denmark
the organisation is called DANAK. In practice an accredited certificate
must be recognised in any country that are member of the EA organisation.
Companies or organisations issuing traceable certificates, must be
able to document that all reference instruments used for the specific
calibration is traceable to one or more primary reference laboratories.
Traceable means in this case, an unbroken calibration chain from the
instrument, over national accredited laboratories until the highest
international level at primary reference laboratories.