"get a read on someone" It could refer to a telepathic ability this guy has, he is asking him to hear his thoughts, scan his memory or possibly send thoughts directly to his mind. It could also refer to a landslide detection system making use of a wireless sensor network to detect someone's movement or so,that are read on a monitor. I think you will know which one is the case from the context or the scene if it is a serie or so. The translation " go cheat or dupe someone " is in Russian no ? ,it might be a wrong one ,like not an accurate one related to the context or merely a literal translation that does not explain the technicality of the situation.

know what the person is thinking. get a read on them. sometimes, can mean even how the personis acting or his or hers movements in that way you can get a read on what the person is thinking

There's a tracking system. To get a read from the tracking system means to be able to see it on your monitor. One guy is talking about reading minds. The other guy wants him to stop talking nonsense and focus on the job at hand, which is watching the read outs from the tracking system. When the tracking system picks up somebody and shows it on your monitor, we say you are getting a read (=noun) on someone.