User's Guide ______________________________________________________________________
54 __________________________________________________________________ M210667EN-C
- 80C552 CPU (including 8-channel 10-bit ADC)
- RAM and Flash memory
- 2-channel 20-bit ADC
- EEPROM
- RS-485 interface
The functional units of the measurement head CPU LTC112 are the
following:
- Power supply
- RS-485 module interface
- Alignment unit control
- Heater control
- Piezo beeper
- Automatic transmitter/receiver mode detection
- Temperature measurement near the windows
- Temperature measurement far away from the heater elements
- Modulation frequency generation for window transmitter
(approximately 250 Hz)
- Modulation frequency generation for the main transmitter (in case of
transmitter configuration; approximately 1 kHz)
- Window receiver (including the optics tube and adapted optical filter)
including temperature measurement
- CPU with all necessary peripherals and software download through
serial data interface capability
- 2-channel 20-bit ADC for main receiver signal (in case of receiver
configuration) and window receiver signal
- A/D conversion of the window transmitter intensity measurement
- A/D conversion of the main transmitter intensity measurement (in
case of transmitter configuration)
- A/D conversion of the main receiver DC signal measurement to detect
possible saturation situations due to solar radiation and/or to
compensate for solar radiation influence (in case of the receiver
configuration)
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