State system for the uniformity of measurements. Standard platinum resistance thermometers of the first and second grades. General technical requirements
Description in Russian:
Термометры сопротивления платиновые эталонные 1-го и 2-го разрядов. Общие технические требования
State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of alternate electrical voltage to 1000 V in the frequency range from 1-10 in minus 2 degree up to 2-10 in 9 degree Hz