可能原因：板子损坏，接线错误，板子丢失。
Possible cause: board broken, wiring mistake, board missing.
在安装中虽然特别小心，但也难免不发生接线错误。
Special care must be paid in the course of installation, but still connection error can not be avoided.
对安装问题，如保护接线错误，防止损害的编码器，而免疫能力电气噪声编码器的信号保持不变。
Protection against installation problems such as wiring errors prevents the encoder from damage, while immunity to electrical noise keeps the encoder signals intact.
文章分析了二次绕组带有抽头的套管电流互感器(CT)，其二次端子接线错误对CT变比的影响。
The paper analyses the current transformer (ct) that secondary winding possesses casing tap, and its secondary connector wiring fault's influence on the ct changing rate.
论述了中性点绝缘系统中采用的三相防谐振电压互感器的原理与结构，并指出了运行中容易发生的接线错误。
The principle and structure of the resonance-proof three phase voltage transformer used in the neutral insulation system are discussed. The connection errors brought about in operation are presented.
然而，我并没有及时更新上个世纪七十年代末的电子设备，并且在连接线路时犯了一个错误。
I was not, however, really up-to-date on the electronic devices of the late 1970s and made one mistake as I was making all of the connections.
再通过参数的测量、相量图的分析，确定错误所在，最后写出在错误接线方式下的功率表达式。
Then, through the measuring of parameter, the analysis of phasor diagram, to confirm the mistake, and finally get the power expression under the false connection way.
对于电能计量装置的各种错误接线，本文提出了一些更方便、更有效的分析和判断的方法，并以实例进行详细阐述。
Convenient and effective analysis and judgment method for all kinds of wrong wiring of electric energy metering device was put forward and detailed description had been made by examples.
目前一些现场校验仪具有少量错误接线判断的功能，对于电能计量装置运行状态检测工作来说是远远不够的。
At present, some of the field calibrator has little incorrect connection judging function, for the electric energy metering devices running state detection work is far from sufficient.
介绍三相三线有功电能表错误接线常见情况，介绍检查、分析及更正方法。
This paper introduces error_wiring common situation of three phase and three line active electric energy meter, and introduces the methods of test, analysis and amendment.
接线图假设采用错误通道设置。
The wiring diagram assumes that you use the default channel settings.
先进的微处理电路给仪器带来最佳的表现。杜绝错误报警，提供直接线性的输出，同现有的控制系统兼容。
Advanced micro-power electronics deliver superior performance, eliminating false alarms and providing a direct linear output for compatibility to existing control systems.
先进的微处理电路给仪器带来最佳的表现。杜绝错误报警，提供直接线性的输出，同现有的控制系统兼容。
Advanced micro-power electronics deliver superior performance, eliminating false alarms and providing a direct linear output for compatibility to existing control systems.
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