Jia Libo
HIMALAYAL - SHANGHAI - CHINA
Abstract: In order to stipulate the uncertainty in basic error measurement of DC resistance tester, the paper establishes the mathematical model, studies on uncertainty transmission rate, and evaluates input standard uncertainty and synthetic standard uncertainty, further providing references for some relative evaluation to a certain extent.
Key words: measurement error, uncertainty evaluation, tester
1.Overview
1.1 Measuring method: refer to JJG 837-2003 Verification Regulations of DC Low Resistance Meter
1.2 Environment condition: in most cases, keep the temperature 20 ± 5 ℃ and the relative humidity is no higher than 75%.
1.3 Measuring standards: BZ3 standard resistance; main technical indicator is 0.01 level
1.4 Test object: DC resistance tester with 0.1 precision level
1.5 Measuring method: adopt 4-terminal connection method; standard resistance is connected to test end of DC resistance tester and then conduct digital comparison to determine the basic error of DC resistance tester.
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