题目内容
(请给出正确答案)
[单选题]
欲测量60mV电压,要求测量误差不大于0.5%,应选下列哪一块毫伏表()
A.量程为0~400mV,0.2级毫伏表
B.量程为0~400mV,0.1级毫伏表
C.量程为0~200mV,0.1,级毫伏表
D.量程为0~200mV,0.2级毫伏表
查看答案
如果结果不匹配,请 联系老师 获取答案
A.量程为0~400mV,0.2级毫伏表
B.量程为0~400mV,0.1级毫伏表
C.量程为0~200mV,0.1,级毫伏表
D.量程为0~200mV,0.2级毫伏表
A.环境温度为20℃,露点仪的测量范围应满足0至-60℃
B.环境温度为20℃,露点仪测量误差不超过±0.6℃
C.在25℃条件下,其最大允许误差应不超过5%RH
D.如果为阻容式湿度计,测量范围应满足0至-60℃,其测量误差不应超过±2℃
A.1/10
B.1/15
C.1/20
D.1/5
A.500
B.300
C.200
D.100
A.±0.02%、±0.5′
B.±0.015%、±0.45′
C.±0.02%、±1′
D.±0.015%、±1.5′