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4 FUNCTIONAL
DESCRIPTION
The
CL551
portable temperature calibrator functional block diagram is shown below.
POWER DRIVER
Modulated fan
A/D COVERTER
External Standard Sensor
POWER SUPPLY
Mains supply 110 or 220V
MICROCONTROLLER
SWITCH TEST
KEYBOARD
RS 232 INTERFACE
Internal reference sensor
Equalizing Block
Peltier cells
The instrument functional blocks are the following ones:
•
power supply
•
microcontroller (central unit + memory)
•
A/D converter
•
power driver
•
keyboard
•
switch test
•
digital interface
•
digital display
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