Please explain the number printed on the DFU to me: whats the meaning of each digit in detail?

Please explain the number printed on the DFU to me: what's the meaning of each digit in detail?

Here you have an example: the number printed on the DFU of EliA TG for Phadia 250 and the corresponding explanation:

250-5642 -01 / UK

250: Phadia instrument

5642: product

01: version of DFU

UK: country

 

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As in all diagnostic testing, the diagnosis is made by the physican based on both test results and the patient history.