"用仪表测量" can be translated into English as "measure with an instrument" or "conduct measurements using an instrument".
Both expressions convey the idea of performing measurements using a specific device or tool (instrument). The choice between them may depend on the context or the level of formality desired.
"Measure with an instrument" is more concise and commonly used in everyday or technical contexts.
"Conduct measurements using an instrument" is slightly more formal and emphasizes the process of performing the measurements.