【2017年整理】电工仪表的基本知识.ppt

Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 电流、电压、电阻 电工测量对象 频率、相位 功率因数、转速 电功率、电能 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 学习内容 常用仪表结构 选择及使用方法 工作原理 你们掌握仪表的使用方法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 仪表基本知识 指示仪表 数字仪表 智能仪表 比较仪表 仪表分类 安装式仪表 智能仪表 便携式仪表 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 仪表型号的编制规则 安装式 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 仪表型号的编制规则 便携式 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 仪表型号的编制规则 电能表 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 电工仪表的标志 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 常用测量单位符号 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 按外界条件分组的常用符号 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 第2节：仪表的误差和准确度 误差： 测量结果与被测量的实际值之间总会存在一定的差值，这个差值叫做误差。 附加误差 基本误差 分类 绝对误差 引用误差 相对误差 表示方法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 仪表的准确度 准确度： 仪表的测量结果与实际值的接近程度。 仪表的准确度等级 注意： 实际测量时，为保证测量结果的准确性，不仅要考虑仪表的准确度，还要选择合适的量程，通常测量时要使一起指针处在满刻度的后三分之一段 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 测量误差及消除方法 测量者： 1、正常环境下工作 2、选择合适的仪表 3、工作者责任心要强