BS 3718:1964

Specification for laboratory humidity ovens (non-injection type)

Performance, construction for conditioning ovens of forced-circulation type, relative humidity controlled by saturated salt solutions. Temperature variation, temperature fluctuation, relative humidity with specified saturated salt solution, long-term stability of oven conditions, reproducibility of oven conditions, time of recovery, effect of moisture transfer on oven condition. General design, salt tray; air ciculation; sealing; observation window; condensation; adjustment of temperature setting; pro vision for instruments. Test methods. Operation and maintenance, information on relative humidity over saturated solutions of various salts, standard conditioning atmospheres, typical conditions prescribed in test specifications, conversion tables for forced-ventilated wet-and-dry bulb hygrometers.