Resolution and accuracy are related, but are not the same thing. Accuracy cannot be better than the resolution, but the resolution can be better than the accuracy. Resolution refers to the smallest difference that can be detected by the instrument. A voltmeter with possible displays of 10.03 and 10.04 has a resolution of 0.01. But that voltmeter might not be that accurate. 10.03 on the display might really be 10.44 volts. Even though the absolute accuracy is not so good, the meter can still tell the difference between two voltages that are 0.01 volts apart.