By default, all log and sensor data recorded during the day are automatically closed by the monitoring system at 00:00 (device time). If you have restarted your networked measurement and monitoring system in the meantime, new files will be created automatically.
The log files are written by the measuring and control device equipped with an SD card drive to a special directory on the SD card. The directory name consists of the Didactum device type and its hostname. Example: "Didactum 100-192.168.0.193". All log files (log), video files (video), sensor dump files (sensors), and log archive files (archive) are stored in this directory. The log files are generally named according to the date and time of their creation. Example: "2020.03.17_23-30-43.log". Important service information from your Didactum monitoring system is listed at the beginning of each log file. The log files are written by the Didactum monitoring system in text format. The measurement data from the connected sensors is recorded in CSV format. The CSV text table format is supported by many software programs, including Microsoft Excel.
For example, if we assume that your Didactum 500 measuring and monitoring device creates only one log file every 24 hours, approximately 5,000 log files can be stored on a 16 GB SD card. In theory, this corresponds to a period of roughly 5,000 days, or more than 13 years. The size of each log file depends, among other things, on how many sensors are connected to the measuring system and at what interval the log files are saved.
As a general rule, all data storage devices (SD card, USB memory stick) connected to the Didactum Monitoring System must be deactivated in the web interface before removal. For example, if you wish to remove the SD card from your Monitoring System 400 or 500, please go to System Settings => Logging => SD Card => Eject in the German-language web interface. If the SD card is not deactivated in the monitoring system beforehand, data loss is likely!
In the German web interface of your monitoring system, go to the "System Settings" menu. In the "Logging" tab, please scroll down to "Sensors". At the very bottom, you can change the measurement interval. Choose between real-time recording (every second) or every 5 / 10 / 15 / 20 / 30 / 60 seconds. Then click "Save" and, by clicking the floppy disk icon (top right), permanently save the settings to your SNMP-based measurement and monitoring device.
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If a time is defined in the hysteresis field (Low Alarm 1, Low Warning 1, Normal 0, High Warning 1, High alarm 1), the corresponding sensor switches to the new state after a delay of the preset number of seconds.
The countdown begins the moment the sensor reading leaves the previously defined threshold or state.