"仪表误差" can be translated into English as "instrument error" or "meter error" (depending on the specific context, with "instrument error" being more commonly used in technical and engineering fields).
Instrument error generally refers to the deviation or inaccuracy in measurements made by various instruments, including but not limited to meters, gauges, and other measuring devices.
Meter error is more specific and typically refers to errors associated with meters (such as electric meters, water meters, etc.), but it can also be used in a broader sense depending on the context.
In most technical and engineering contexts, "instrument error" would be the preferred and more widely recognized term.