"To get a reading" means to obtain or measure a value or information from a device, instrument, or system.
Sentences with «to get a reading»
Can you not get a reading on heat and cold waves from daily temperature records? (realclimate.org)
With it, applications do not get read by people. (careerladder.sg)
Many candidates consider cover letters as just pieces of paper that no one reads; in actuality, cover letters get read more than resumes do. (coverlettersandresume.com)