本文介绍了数百项单精度测试的结果 制造商5/8英寸×3/4英寸家用水表，所有水表的使用年限均为 现场服务，但通过流量计的累积水量不同。关系 介绍并讨论了AWWA low的精度和累积流量之间的关系， 中等和高流量精度测试模式。水表更换的经济性很低 讨论了三个流量测试范围的精度流量关系，以及 通过流量计确定经济最佳累积体积的过程如下: 描述。对于测试仪表所依据的亚利桑那公用事业公司，建议 利用特定的年平均居民用水提出了更换时间表 有效的使用和水费结构。不同公用设施的最佳更换量 根据水表环境、用水、更换水表的经济性和 水费。包括表格、数字。

This paper presents the results of hundreds of accuracy tests of single manufacturer 5/8-inch by 3/4-inch domestic residential water meters, all having the same age of field service but varying amounts of cumulative water flow through the meter. The relationship between accuracy and cumulative flow is presented and discussed for AWWA low, medium, and high flow accuracy test regimes. The economics of water meter replacement is discussed relative to the accuracy-flow relationships for the three flow test ranges, and the process for determining the economic optimum cumulative volume through the meter is described. For the Arizona utility from which the meters tested were derived, the recommended replacement timeframe is presented utilizing the specific average annual residential water use and water rate structure in effect. The optimum replacement volume for different utilities will vary based on water meter environment, water use, economics of meter replacement, and water rates. Includes tables, figures.