压带对需要在电压上限值和下限值范围内运行的设备提供保护，允许内部继电器保持通电。

Voltage band provides protection to equipment required to operate within an upper and lower voltage limit, allowing the internal relay to stay energized.

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通过键盘可设置：功率、测试时长、记录周期、电压下限、电压上限、导线内阻、操作模式、日期、时间等参数。

Power, test time, record period, voltage lower limit, voltage upper limit, lead internal resistance, operation model, data and time parameter can be set with keyboard.

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额定输入功率或额定电流的上限值和下限值应标在器具上，以使得输入功率与电压之间的关系是明确的。

The upper and lower limits of the rated power input or rated current shall be marked on the appliance so that the relation between input and voltage is clear.

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