Yokogawa µR20000 - Manual (Page 8)

1-1
SM 04P01B01-01E
Principles of Operation
1
Chapter 1 Principles of Operation
1.1 Principles of Operation
The following explains the principles of operation of the µR10000.
Block Diagram
Block Diagram (Pen Model)
Display / Panel keys
Chart end detection (/F1)
Chart paper feed motor
CPU A/D converter
Scanner
Power supply
Input terminal
Pen servo (pens 3 and 4)
Pen servo (pens 1 and 2)
Plotter
Block Diagram (Dot Model)
Chart end detection (/F1)
Display / Panel keys
Chart paper feed motor
CPU A/D converter
Scanner
Power supply
Input terminal
Dot printing mechanism
Input Terminal
For connecting the measurement input signal wires. The terminals can be used for DC
voltage, thermocouple, resistance temperature measurement, and contact input.
• The reference junction compensation circuit for thermocouples is built in.
• Proven transistor method used for measuring the temperature of the terminals.
• Metal core construction used in the internal printed circuit boards to equalize
temperature.
• Input terminals removable.
Scanner
Switches the measured input signal (channel). The input signal switching section uses
highly reliable solid state relays (SSR).
The pen models use two A/D converter, one is for channels 1 and 2, the other for
channels 3 and 4.
On the dot model, all channels are driven by one A/D converter.