7 注意事项 Matters need attention
7.1 装置应安装在干燥、清洁、远离热源和强电磁场的地方。
The device should be installed in a dry, clean place away from heat source and strong electromagnetic field.
7.2 装置接线时应注意交流电压、电流的相序和极性，否则将导致测量不准。
Attention should be paid to the phase sequence and polarity of AC voltage and current when the device is connected,
otherwise the measurement will be inaccurate.
7.3 电流输入必须使用 CT，进线 CT 的变比参数需通过通讯进行设定。
The current input must use CT, and the variable ratio parameters of incoming CT must be set through communication.
7.4 CT 的精度影响本装置的测量精度。CT 的角差将影响装置的功率、电能等测量精度。
The accuracy of CT affects the measurement accuracy of this device.The angular difference of CT will affect the
measuring accuracy of power and electric energy.
7.5 应用于无 PT 的直接接入系统时应装设 2A 的保险丝。
A 2A fuse should be installed for direct access systems without PT.
7.6 装置上电流输入的 CT 接地端应分别引至接地端子上，不可在装置上先将电流输入接地端并联起来后再引
至接地端子。
The CT grounding terminal of the current input on the device should be led to the grounding terminal separately. It is
not allowed to connect the current input grounding terminal in parallel and then lead to the grounding terminal on the
device.
7.7 通信电缆应使用屏蔽双绞线。
Communication cable should use shielded twisted pair.
8 常见故障的诊断、排查方法 Common fault diagnosis and troubleshooting methods
8.1 装置的测量不准确
The measurement of the device is not accurate
*检查电压、电流的接线是否正确，电流输入的进出线是否正确；
Check whether the wiring of voltage and current is correct, and whether the incoming and outgoing lines of
current input are correct;
*检查装置的 CT 设定是否与外部实际使用的 CT 对应；Check whether the CT setting of the device corresponds to the actual CT used externally;
8.2 电压、电流测量正确但功率测量不准确
The voltage and current are measured correctly, but the power is not measured accurately.
*检查电流输入方向是否正确；
Check whether the current input direction is correct;
*检查每个电流回路对应的相位是否正确；出线回路需按实际接入进行调整；
Check whether the corresponding phase of each current loop is correct;The outgoing circuit shall be adjusted
according to actual access.
8.3 通信不正常 Abnormal communication
*检查通讯连接线是否连接正常；
Check whether the communication cable is connected normally;
*检查通信的 A、B 端子是否交错；
Check whether the A and B terminals of communication are interlaced;
*检查装置的地址是否设定正确，通讯波特率是否设定正确；
Check whether the address of the device is set correctly and the communication baud rate is set correctly;
*多装置通讯不正常时，先试一下单机通讯是否正常；
When the communication of multiple devices is abnormal, first try whether the single communication is
normal;
8.4 进线电压、电流、功率都有，但电能就是无数值
There is incoming voltage, current, and power, but electricity has no value.
*检查进线的 CT 变比设置
Check the CT ratio setting of the incoming line.
8.5 AMC16Z-ZD 在负载没有电流时电流有数值
The current of AMC16Z-ZD has a value when the load has no current.
*调整 AMC16Z-ZD 的电流零点值。（直流霍尔传感器的零点不一致，差异较大，需进行调整）
Adjust the zero value of AMC16Z-ZD current.(the zero point of dc hall sensor is not consistent, the difference
is large, need to be adjusted)
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