目 录
1 范围 ························································································…… (1)
2 引用文献 ···················································································…… (1)
3 术语和计量单位 ···········································································…… (1)
3.1 车速里程表 ··············································································…… (1)
3.2 里程表常数 k ·········································································…… (1)
3.3 车辆系数 w ··············································································…… (1)
3.4 速度表常数 ··············································································…… (1)
3.5 转速稳定度 ·············································································…… (1)
4 概述 ··························································································…… (1)
5 计量性能要求 ·············································································…… (2)
5.1 标准装置信号源频率准确度与4h频率稳定度 ··································…… (2)
5.2 转速范围 ·················································································…… (2)
5.3 转速不确定度 ···········································································…… (2)
5.4 0.5h转速稳定度 ········································································…… (2)
5.5 转速分辨力 ··············································································…… (2)
5.6 计数允许误差 ···········································································…… (2)
6 通用技术要求 ·................................................................................... (2)
6.1 外观要求 ···············································································，·…… (2)
6.2 输出接口要求 ··········································································…… (2)
6.3 工作噪声要求 ···········································································…… (2)
6.4 附件及说明书要求 ·····································································…… (2)
7 计量器具控制 ··············································································…… (2)
7.1 检定条件 ·················································································…… (3)
7.2检定项目和检定方法 ···································，·············，···············…… (3)
7.3检定结果的处理 ········································································……(5)
7.4 检定周期 ·····，···········································································…… (6)
附录A 车速里程表标准装置检定记录 ·················································…… (7)
附录B 检定证书背面格式 ································································…… (8)
范 围
本规程适用于各类车速里程表标准装置的首次检定、后续检定和使用中的检验。
2 引用文献
OIML国际建议 No 55一1981机动车辆用的速度表，机械式里程表和瞬时记录仪。
应注意使用引用文献的现行有效版本。
3 术语和计A单 位
31 车速里程表
机动车辆用于指示车辆瞬间速度的仪表称为速度表，用于指示车轮在行驶过程中运
转总转数所对应的里程的仪表称为里程表，两者共装于同一机壳内的仪表总称为车速里
程表。
3.2 里程表常数 k
根据信号的类型 (驱动轴的转数或脉冲数)，以及里程表或瞬时记录仪指示和 (或)
记录每增加 lkm里程所必须接受的信号数的特征量，常数 k应以转/公里或脉冲/公里表
不 。
3.3 车辆系数二
根据信号类型 (驱动轴的转数或脉冲数)和车辆每公里行程时车上装置发出并传导
到里程表或瞬时记录仪的信号数的特征量。
系数劝必须同常数k用同一种单位表示。
系数w随车辆的负载、尺寸大小、轮胎压力和磨损程度而改变，它必须在标准试
验条件下测定。
3.4 速度表常数
根据信号类型 (驱动轴转数或脉冲数)和速度表指示60km/h速度时的信号频率的
特征量 。
速度表常数可以表示为每分钟的转数，即转/公里，也可表示为每分钟的脉冲数，
即脉冲/公里。当里程表和速度表两种仪器用同一驱动系统时，速度表和里程表使用同
一里程表常数 k0
3.5 转速稳定度
在0.5h的时段内，每隔3min所测转速最大、最小差值与平均值之比。
4 概 述
车速里程表标准装置 (以下简称标准装置)用于检定机动车辆用的速度表、里程表
和车速里程表，亦可用于检定相应准确度的转速表。
