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Title: Types Of Telemetering Systems
Author: C. S. Mumper
Source: 1971 Appalachian Gas Measurement Short Course
Year Published: 1971
Abstract: Two types of temeters can be discussed, classified by the form of the electrical transmission of the measured quantity. These are (1) the analog telemeter and (2) the digital telemeter. In the analog type telemeter, the electrical signal transmitted is directly proportional to the measurered quantity, whereas in the digital telemeter, the electrical transmission signal 5 related to the measured quantity only by definition according to the encoding technique being used. The analogue meter can be further subdivided into several categories by the nature of the electrical transmission, but we will discuss two categories of major interest. The first these two develops on output signal impulse of variable time duration, proportional to the measured variable. The second type develops an output signal in which the requency varies in proportion to the measured quantity.

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