Simpson 460 4 Series - Overall System

SECTION V
THEORY OF OPERATION
5.1 GENERAL
5.1.1 This section describes the theory of operation of the 460.
All modes of operation are described first; then, description of the
circuits follows.
5.2 OVERALL SYSTEM
5.2.1 The basic system block diagram for the 460 is shown in
Figure 5-1.
5.2.3 Signal Conditioning Section
5.2.4 The parameter being measured is connected to the appro-
priate input terminals. The corresponding Signal Conditioning cir-
cuit converts the parameter into a proportional DC voltage. The
conversion is accomplished by the Attenuator, Current Shunts,
Resistance Converter, AC-to-DC Converter, and associated switch-
ing.
5.2.5 Analog-To-Digital Converter Section
5.2.6 The Analog-To-Digital (A/D) Converter section changes
the DC output voltage from the Signal Conditioning section to
digital information. The A/D Converter also provides a propor-
tional analog signal for the Analog Display.
5.2.7 Display Section
5.2.8 Through the Segment and Anode Drivers, the digital in-
formation from the A/D Converter is indicated on the 7-segment
Numerical Display. The proportional analog signal is indicated
by the Analog Display.
5-1