User's Manual

Technical description
14
In order to expand the operating time of the measuring system, the data logger can be
connected to an external rechargeable battery pack which can be ordered from
SebaKMT.
The logger is connected to the external battery pack by means of the VK88 connection
cable. The 10-pole connector (red) of the cable has to be plugged in the DC ext.
socket of the logger. Then the 5-pole connector has to be plugged in one of the sockets
of the battery, no matter which one. From now on the logger is powered by the external
battery only, until the connection is cut or the capacitance of the external battery gets
low. In that case, the logger switches back to internal power supply.
Use the supplied mains adapter to recharge the external battery pack. Plug the round
5-pole connector in one of the sockets of the battery, no matter which one. Once the
battery is connected to the mains, it is charging. The charging process for a fully loaded
battery takes 12 to 13 hours. Overcharging of the battery cannot occur if the supplied
mains adapter is used.
2.5 Memory
The device has 4 MB internal memory. For example, if 4 sensors are connected and a
recording interval of 5 minutes is specified, this is sufficient for 5 years non-stop data
recording. As part of the programming process, the logger can be set to "ring memory
mode". As the memory fills up with data in this mode, the device keeps logging and the
respective oldest value is overwritten.
External rechargeable
battery pack