BMXXBE2005施耐德在气体流量设计中，PPG可以支持扫频模式，激励频率可以设定在范围内。这样TI 超声波方案可以支持宽频率特性的换能器。换能器的频率特性受环境温度、一致性、长时间老化等因素而变化，激励频率可以覆盖这些范围，确保我们燃气表测量的和稳定性。在扫频模式下，我们可以通过下面公式来计算频率变化的步长。
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