单片机对焊接电流、电弧电压、电流给定、脉冲周期、占空比、基值电流、收弧电流衰减时间、前气和后气时间等焊接参数进行采样、计算和控制。
The welding current, arc voltage, preset current, the period and ratio of pulse, base current, down slope time, gas pre and post flow time are sampled, calculated and controlled by microprocessor.
应该等待足够的时间，使开关瞬态信号衰减，电流达到稳定，然后再进行测量。
The current should be measured after a sufficient settling time to allow the switching transients to decay and the current to stabilize.
泄漏电流随时间呈指数衰减，所以通常需要在一个已知的时间期间内施加电压(浸润时间)，然后再测量电流。
The leakage current will decay exponentially with time, so it's usually necessary to apply the voltage for a known period (the "soak" time) before measuring the current.
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