The big disadvantage is the loss of accuracy and resolution, but some digital picoammeters combine accuracy and dynamic range by combining autoranging and digital log conversion.

这种方法，较大的缺点是损失了准确度和分辨率。，有些字式，采用自动量程和字对变换的方法，这可将准确和宽动态范围结合了起来。