当被试的本安电路进行火花试验引爆后，常采用降低电路参数的方法直至试验合格。有的电路参数在最小点燃电流、电压曲线以下，理论上火花试验不应引爆，实际试验却引爆了；有的电路参数在最小点燃电流、电压以上，实际试验却未引爆，常使设计者无法作出有针对性的改进措施，且 When the subjects of the intrinsically safe circuit spark test detonation, often using the method of reducing the circuit parameters until the test pass. Some circuit parameters in the minimum ignition current, voltage curve below, in theory, spark test should not be detonated, the actual test detonated; some circuit parameters in the minimum ignition current, the voltage above the actual test did not detonate, often make the designer unable to Make targeted improvements, and