MWS_55_e.indb Page 14
Manual MWS 55 / MWS 88 / MWS 10 and Sensors 55
geändert am 04.12.2020 von DO
REINHARDT
System- und Messelectronic GmbH
Fax: 08196/7005 and 1414 email:
wetter@reinhardt-testsystem.de
http://www.reinhardt-wetterstationen.de
3 Technical details
3.1 The data logger
The data logger of the MWS 55 has got an internal SD-Card with 8GB.
When storing data with an interval of 10 seconds the device stores 267840 data sets a month (31
days). With 15 active sensors (clock and date also counts as a sensor) the monthly data file has
a size of app. 31.5 MB.
So there are app. 375MB of data a year which allows storing of data for more than 20 years wit-
hout the need of deleting any data.
The data files are stored on the SD-card in the folder "/log/data".
Each month a new data file is being created which contains the month and the year in it's name.
The file suffix is "mws".
The name of the data file of march 2015 therefore is 03_2015.mws.
The data file are ASCII files (text files).
The SD-card contains other files important for operating the weather station. These files must
not be deleted or edited.
3.2 In case of power failure
The datalogger of MWS 55 is kept up in case of power failure (EEPROMS), but no new data are
stored.
The MWS 10 keeps running up to 4 hours after power loss if the internal accu block was fully
charged.
In case of power failure, the clock of MWS 55 is kept running and doesn't need to be set when
power is applied again!
Due to power failure there are data missing in the data files (time gaps). These gaps are filled
with dummy values (-99999) by the weather32 software when reading the logger.
So missing data are indicated by measure values of -99999 in the datafile. The software then re-
cognizes in the values of -99999 that data are missing and creates a gap in the graphical displays.
3.2.1 The internal clock (CAUTION!!)
The MWS 55 has a batterie powered clock eliminating the need to use a computer or GPS-receiver
to start a measurement with data logging.
Please note that the batterie discharges when the MWS 55 is not used. When storing the MWS
55 without power supply for app. 9 months the batterie (Lithium cell CD3032) is empty and must
be replaced!
To perform this the housing of the MWS 55 has to be opened.
3.2.1.1 Deactivation of Lithium cell when storing the MWS 55V for a longer time
Since board version 1.057 buffering the internal clock by the Lithium cell can be switched off to
avoid discharging the Lithium cell.
This also is the delivered condition! That's why the clock needs to be set after the first
start to ensure proper storage of data! When applying power to the unit the Lithium
cell is activated automatically!
If you want to store the MWS 55V for a longer time without power applied you should
deactivate the Lithium cell!
The command for deactivation of the Lithium cell is:
*ADMIN POWER REMOVE
To activate the Lithium cell use the command:
*ADMIN POWER MOUNT
