Searched refs:Y_CONSTANT_2 (Results 1 – 1 of 1) sorted by relevance
41 #define Y_CONSTANT_2 (0.6549) macro95 ppm = pow(X_CONSTANT_2 * vol / (VOILTAGE_5_V - vol), 1.0 / Y_CONSTANT_2); /* 计算ppm */ in Mq2GetPpm()