Abstract
Generally, electric and magnetic interference will affect in high resistance measurements. This causes a large number of the standard deviation of measurement as well as the accuracy and result of measurement. The purpose of this research is to study the effectiveness of shielding and guarding on the measurement system. In experimental setup, the 1 GΩ resistance was supplied by voltage source of 100 V, 500 V and 1000 V in with and without shielding and guarding. The resistance value and standard deviation were measured and compared in each case of measurements. From the experimental results, when applying shielding and guarding, the noise can be reduced. As a result, the standard deviation was decreased more than 10 times.
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