Amplitude check is a tool for deciding whether a device is suitable to measure throughout the next calibration period without interruption despite continuing accumulation of dirt. The dirt on the flow sensors reduces the ultrasonic signal amplitude over time. This amplitude reduction is compensated for by controlled amplification in the meter. If the amplification is above a certain threshold, the device will output a F0 prewarning in the data telegrams (see Section 5.4) to indicate that action must be taken.
如果需要更多的增幅，最终达到了临界阀值，F0将会被输出，因为不可能再进行可靠和正确的测量（在公差带中的错误）了。如果在达到两个阀值（F0预警和F0）之前有足够长的距离，仪表将有足够的测量储备。这就是振幅检查所确认的
上海翻译。
If even more amplification is required, eventually reaching a critical threshold, F0 is output because reliable and correct measurement (error within a tolerance band) is no longer possible. Aeter has enough measurement reserves if the distance before reaching the two thresholds (F0 prewarning and F0) is large enough.
振幅检查是通过菜单项
This is what the amplitude check verifies.
维护/振幅检查
The amplitude check is started with
启动的，然后自动运行。然而，某些容积测量装置会对安装距进行询问。振幅检查调用测试模式容积，读取Eb可选电报，并且可能改变测量参数，虽然它最后将它们重新设置回原始值。因此，振幅检查就是一项不改变测试特性的功能。
在您能够进行振幅检查之前，仪表必须有一个装满水的容积测量装置，没有气泡，彻底淡化，仪表必须在Nb、Pb-V或Pb-Q模式下不显示F0，并且，流量模拟（参见第10.1节）必须是未被激活的。如果不是这样，振幅检查可能会返回一条出错信息。
Maintenance/Amplitude check and then runs automatically. However, certain volume measuring units include a query for the mounting length. The amplitude check calls up test mode volume, reads the Eb optional telegram, and may change the measurement parameters although it does reset them to their original values at the end. The amplitude check is therefore a function that does not alter the measurement characteristics.
Before you can perform an amplitude check, the meter must have a volume measuring unit filled with water without bubbles and complete desalinated, the meter must not display F0 in Nb, Pb-V, or Pb-Q, and flow simulation (see Section 10.1) must not be active. If this is not the case, the amplitude check will return an error message.
振幅检查的结果是通过/不通过的决定。考虑到存在许多设备的公差和不同类型的设备，更多的详细信息将会是没有帮助的。通过应用标准的UltraAssist专业版可以做出专家将会使用更专业的设备的决定（示波器）
日语翻译。
The result of the amplitude check is a go/no-go decision. Given the numerous device tolerances and different types of device, more detailed information would not be helpful. By applying the criteria UltraAssist Profi makes the decision that an expert would make using further equipment (oscilloscope).
