Measure value over range, change measure range.
测量值超程, 更改量程范围.
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A heat range change is not recommended.
一热的变化范围是不推荐这样做.
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Working frequency is from 50 Hz to 5 kHz . Measuring function and range change arecontrolled by logic circuit.
工作频率为50赫至5千赫.
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