69型比长式 CO 检定管测定结果的准确度受温度影响较大。测定时,温度越高,测定结果越偏低,反之,温度越低,则测定结果越偏高。例如有一 CO 标准气样,25℃时用检定管测定,结果为300ppm;在10℃时测定结果可达406ppm;在40℃时测定结 69 than the length of the CO tube test results of the accuracy of temperature-dependent. Determination, the higher the temperature, the lower the measurement results, on the contrary, the lower the temperature, the higher the measurement results. For example, there is a CO standard gas sample, which is measured by a test tube at 25 ° C., and the result is 300 ppm; the result of measurement is up to 406 ppm at 10 ° C.;