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– the elements to control;
– the instrument or the measuring assemblies, separate references
included;
– the accessories: calculator, recorder, printer, etc.;
– the instructions for use of the main measuring instrument;
– a laboratory notebook.
The secret of metrology lies in the saying, “More haste, less
speed”. Indeed, to avoid a series of measurements turning out to be
useless, a many precautions must be taken before starting:
– check the measuring assemblies;
– give sufficient time for the stabilization of the elements to be
measured;
– use a guide list that you have drawn up for each type of
operation;
– keep a laboratory notebook and write down all the information
about the operations: date, time, identification of the elements
controlled, operations undertaken, results, temperature, etc.
Regarding notices concerning the stabilization of measuring
instruments: if there is a lack of indications in technical notices –
which frequently occurs – tests will have to be carried out in order to
determine how long they should work to obtain the nominal
characteristics.

III Answer the questions:
1 What actions transform mere measuring into a “metrological action”?
2 What is the secret of metrology?
3 Where have the instruments to be set up?
4 What precautions must be taken before starting measurements?

IV Fill in the blanks with appropriate words:
1 It is not … just to read or record a physical 1 secret
quantity from a suitable … . 2 apparatus
2 All these extra … transform … measuring 3 desirable
into a “metrological action”. 4 precautions
3 The … of metrology lies in the saying: 5 sufficient
More …, less speed”. 6 suitable
4 To avoid a series of … turning out to be 7 disposal
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