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BS ISO...
BS ISO 16000-34:20- 18 Indoor air ...
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18/30352716...
18/30352716 DC:2018 BS IEC ...
1.1 ,This guide describes the techniques and apparatus required for the accuracy verification of industrial platinum resistance thermometers constructed in accordance with Specification E1137/E1137M and the evaluation of calibration uncertainties. The procedures described apply over the range of -200 °,C to 650 °,C.