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Metrology instruments should not be subjected to rough
conditions of use; for example:
– no shocks;
– no vibrations;
– restricted temperature field;
– possibility of leaving the electronic instruments working
permanently;
– handling by qualified personnel.
All this can be taken into account when selecting the types of
instruments.
Finally, it is no use choosing instruments that are automatic or
equipped with a remote control, nor electronic instruments that reach
their nominal characteristics after only a few minutes.

III Answer the questions:
1 What can some electronic instruments be supplemented by?
2 What is the most adequate instrument in manufacturing?
3 What types of instruments have you to choose for a building site?
4 What types should you choose for a metrology laboratory?
5 Why have you to choose fixed references?
6 What kind of conditions of use are not good for metrology
instruments?

IV Fill in the blanks with appropriate words:
1 Some electronic instruments can be … by 1 metrology
filing cards or drawers. 2 conditions
2 In manufacturing, the most … types is the 3 instruments
automatic … instrument. 4 supplemented
3 A instrument is not to be used when the 5 digital
operator has to do an … . 6 adequate
4 For a building site, you have to choose … 7 subjected
that are automatic and … . 8 resolution
5 For a … laboratory, monofunction 9 multifuctionel
instruments with high accuracy and … will be 10 monofunction
prefered. 11 adjustment
6 Metrology instruments should not be … to
rough … of use.
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