准确地测量电感总是比测量其他无源元件要困难一些。测量线圈的主要困难在于，线圈电感和它的效率在很大程度上受频率的影响；同样地，线圈寄生效应（分布电容和铁芯/铜线电阻损耗）会随频率的变化而发生显著的变化。在应用频率下测量线圈即“使用频率测试”要比在传统的标准频率下测试更能代表电路中元件的基值。
It is always more difficult to measure inductance accurately than other passive components. The main difficulty of measuring the coil is that the inductance and efficiency of the coil are largely affected by the frequency; similarly, the parasitic effect of the coil (distributed capacitance and core / copper resistance loss) will change significantly with the frequency. The measurement of the coil at the application frequency, i.e. "use frequency test", is more representative of the base value of the components in the circuit than that at the traditional standard frequency.
通常，测量频率仅为方便测量而规定。如果测量频率不是电路（或“使用”）频率，测试结果一般不能够取得与指定电路相同的电感值或展示相同的效率。鉴于设备和方法最近得到了发展并且现在能够灵活地选择测试频率，应该在实际的使用频率下去测试电感，尤其是当有高精度的要求时。
Generally, the measurement frequency is only specified for the convenience of measurement. If the measurement frequency is not the circuit (or "use") frequency, the test results generally cannot achieve the same inductance value or show the same efficiency as the specified circuit. In view of the recent development of equipment and methods and the flexibility to choose the test frequency, it is necessary to test the inductance at the actual use frequency, especially when there is a high-precision requirement.