Dräger Savina, Service Manual

Page: 343 / 365

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Dr ä ger Medizintechnik GmbH Function Description Savina Version 2.0
   
 
The Control PCB is the central ” control and monitoring unit ” of the Savina. It includes two separate
processor systems: the master and front processors. The program memories are Flash-EPROMs.
The Flash-EPROMs can be programmed with a laptop connected to the serial port of the Savina
(software download).
An EEPROM is provided for each processor system for storage of changeable, non-volatile data.
The EEPROM of the master stores the calibration data of the sensors, fan, etc. The EEPROM of
the front processor stores safety parameters, settings such as contrast, sound volume, etc., as well
as a "backup copy" of the operating hours. The EEPROM of the front processor is plugged in and,
if the board needs to be replaced, must be mounted on the new board.
The board is provided with a real-time clock which is used to display the time and to store the
software options, the unit identification and the operating hours. The real-time clock is buffered by
a battery which is integrated in the real-time clock. The real-time clock also holds the logbook. The
real-time clock is plugged in and, if the board needs to be replaced, must be mounted on the new
board.