| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a measuring apparatus with light which corrects measurement errors superiorly in terms of economy and structure even under a severe temperature condition of a measurement environment, measures highly accurately and maintains insulation properties and resistance to induced noises. SOLUTION: A quartz glass optical fiber 6 and a lead glass optical fiber 7 of the same count of windings are set to an optical sensor in a manner to surround a conductor. A signal-processing circuit 16 in a measuring unit has an output difference operation part 24 obtaining an output difference of the optical fibers 6, 7, a correction coefficient selection part 25 selecting a temperature correction coefficient in accordance with the output difference, a measurement error correction part 26 multiplying outputs of the optical fibers 6, 7 by the correction coefficient thereby correcting a measurement error due to a temperature, and a memory means 27 storing the output difference and correction coefficient.</p> |
