0.1% 精度高。 但有少数情况下除外,但其中又有某些情况可透过更换档位来解决。
以 3 1/2 位电表来举几个例:
19.99V
19.99 ±(0.1%+5) = 19.99 ±(0.02+0.05) = 19.99 ±0.07
19.99 ±(0.5%+3) = 19.99 ±(0.10+0.03) = 19.99 ±0.13
10.00V
10.00 ±(0.1%+5) = 10.00 ±(0.01+0.05) = 10.00 ±0.06
10.00 ±(0.5%+3) = 10.00 ±(0.05+0.03) = 10.00 ±0.08
1.990V 之一
01.99 ±(0.1%+5) = 01.99 ±(0.002+0.05) = 0.20 ±0.05
01.99 ±(0.5%+3) = 01.99 ±(0.01 +0.03) = 0.20 ±0.04
1.990V 之二 (换档位)
1.990 ±(0.1%+5) = 0.199 ±(0.002+0.005) = 0.199 ±0.007
1.990 ±(0.5%+3) = 0.199 ±(0.010+0.003) = 0.199 ±0.013
温馨提示:答案为网友推荐,仅供参考