Philips PM2519 - Page 20

2.2.
2.2.1.
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SURVEY OF THE SECTIONS
Analo:
g section
The analog section comprises the following input measuring signal facilities:
a. A voltage measuring path consisting of:
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AC/DC voltage attenuators
RMS converter (OQ 0068)
ADC converter (OQ 0067)
ADC interface (OO 0071)
b. A current measuring path consisting of:
AC/DC current shunt
— RMS converter
— ADC
— ADC interface
c. A resistance/diode measuring path consisting of:
Current source (OO 0063)
ADC
ADC interface
d. A temperature measuring path consisting of:
— Pt 100 input
~ ADC
— ADC interface
e. A frequency measuring path consisting of:
— AC voltage attenuator
— RMS converter (part of)
~ Dividing circuits
Note: The OQ integrated circuits used in this instrument are specially designed LS! circuits for multimeter
applications to ensure high accuracy and stability.
Fig. 2.2. Block diagram PM 2519
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