Ahlborn ALMEMO 2490-1A, Руководство по эксплуатации

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7. Power supply
15
7.6
Data buffering
The sensor's programming is stored in the EEPROM on the sensor connector
and the device's calibration and programmed parameters are stored in the
EEPROM on the instrument itself, both on a fail-safe basis. Date and time-of-
day are retained intact if the device is just switched off but are lost when the
batteries are replaced.