BEHAVIOUR OF HIGH VALUE STANDARD RESISTORS VERSUS RELATIVE HUMIDITY: FIRST EXPERIMENTAL RESULTS

F. Galliana, P.P. Capra, E. Gasparotto

Abstract

In this paper we report the first experimental results in the characterization of high value standard resistors versus relative humidity. For this aim we adopted a digital multimeter (DMM) based measurement method, already used for characterization of high value resistors versus temperature and applied voltage and to participate in the CCEM-K2 comparison on high resistance. For the realization of the environment with specific values of relative humidity we realized a thermostatic enclosure in which it is possible to set the desired humidity value in the range (10 ÷ 90)% with a long term instability of the humidity up to ± 1%. The preliminary experimental results of characterization suggest us that the value assigned to a high value standard resistor is affected not by the humidity during the calibration period, but by the humidity with which it was maintained several days or weeks before calibration.

Keywords

high value standard resistor, relative humidity, thermostatic enclosure

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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