Very puzzling to have a multimeter with a lot of different logical layers. I am used to find layers in OSI communication protocols and for dedicated devices:
In software engineering, multitier architecture (often referred to as n-tier architecture) or multilayered architecture is a client–server architecture in which presentation, application processing, and data management functions are physically separated. The most widespread use of multitier architecture is the three-tier architecture.
https://en.m.wikipedia.org/wiki/Multitier_architectureDoes your text deschribes the software structure or do we talk about devices or physical layers of the specimen?