B超仪配用断电保护器很有必要。因为在停电后又突然来电时,特别是由本院发电机供电切换为市电供电时(仅数秒钟时间),稳压器输出的瞬时脉冲电压对仪器极为不利,严重时可能使仪器损坏。为保证B超仪的安全,我们自制了一个断电保护器(电路如图所示)。它比市售的电冰箱保护器电路 B-instrument equipped with power-off protection is necessary. Because in the sudden power outage after a sudden call, especially from the Court of the generator power switch to mains power supply (only a few seconds), the instantaneous voltage output voltage regulator is very unfavorable to the instrument, may cause serious damage to the instrument. To ensure the safety of B-meter, we made a power-off protector (the circuit shown). It is more than the commercial refrigerator protector circuit