This standard establis es the methods and means for the verification of hair hygrometers, both indicators and recorders, with an appreciation of 1% relative humidity and a maximum permis ible relative error of 10%, with measurement limits of 30 to 100% humidity. relative.
NC 90-13-37-1986 history
1986NC 90-13-37-1986 Metrological Assurance. Hair Hygrometer. Verification Methods and Means