BS IEC 61017:2016 pdf download – Radiation protection instrumentation — Transportable, mobile or installed equipment to measure photon radiation for environmental monitoring 3.4 Quantities and units In this standard, units of the International System (SI) are used 1 . The definitions of radiation quantities are given in IEC 60050-395. The corresponding old units (non SI) are indicated in brackets. Nevertheless, the following units may also be used: – for energy: electron-volt (symbol: eV), 1 eV = 1 ,602 × 1 0 –1 9 J; – for time: years (symbol: y), days (symbol: d), hours (symbol: h), minutes (symbol: min). Multiples and submultiples of SI units will be used, when practicable, according to the SI system. 4 General test procedure 4.1 Nature of tests Unless otherwise specified in the individual clauses, all tests enumerated in this standard are to be considered as “type tests”. Nevertheless, by agreement between the manufacturer and the purchaser, some of them may be considered as acceptance tests. 4.2 Reference conditions and standard test conditions Reference and standard test conditions are given in Table 1 . Reference conditions are those conditions to which the performance of the instrument is referred and standard test conditions indicate the necessary tolerances in practical testing. Except where otherwise specified, the tests in this standard shall be performed under the standard test conditions given in the third column of Table 1 . 4.3 Radiation performance tests The radiation performance tests are listed in Table 2, which indicates, for each characteristic under test, the requirements according to the clause where the corresponding test method is described. The tests shall be performed under test conditions detailed in Table 1 , except for the quantity being tested. 4.4 Tests performed with variation of influence quantities The classification of electrical, mechanical and environmental characteristics tests is shown in Table 3. Those tests are intended to determine the effects of variations in the influence quantities given in Table 4 and Table 5. All other influence quantities shall be maintained within the limits for the standard test conditions given in Table 1 unless otherwise specified in the test procedure concerned. 4.5 Statistical fluctuations For any test involving the use of radiation, if the magnitude of the statistical fluctuations of the indication arising from the random nature of radiation alone is a significant fraction of the variation of the indication permitted in the test, then sufficient readings shall be...
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