At 09:45 on December 11, 2019, during the annual calibration of 201 tank thermometer, the measuring personnel found that the actual error of the thermometer at the calibration point of 20 ℃ is - 0.411 ℃, which has exceeded the allowable error of the thermometer by ± 0.25 ℃, and the actual error at the calibration point of 121 ℃ is - 0.813 ℃, which has exceeded the allowable error of the thermometer by ± 0.76 ℃.<br>
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