继电器连接在安装头与灯头之间，并在控制器的控制下接通或断开安装头至灯头的电路。

The relay is connected between the mounting head and the lamp head and for connecting or disconnecting the circuit from the mounting head to the lamp head under the control of the controller.

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如果负载电阻被直接连接到伏特计的输入端子，通过继电器触点的电流会产生电压降，测得的电池电压将存在误差。

If the load resistor was connected directly across the voltmeter input terminals, the current through the relay contacts would cause a voltage drop and the measured cell voltage would be in error.

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该系统是可靠的- TFT32发送器和其他控制继电器继续运作，即使没有电脑的连接。

The system is reliable - TFT32 Transmitters and additional control relays continue to operate even without PC connection.

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