ML-x17 DATA LOGGER MANUAL
Manufacturers of low power instruments
page 38
4.10.4 Battery
Replaced
The user must select this when he installs a new lithium battery. The calculations of the rest capacity will
be reset (battery rest capacity 100%)
4.10.5 Rest Capacity
Remaining capacity of the lithium battery. In percentage of a full battery.
4.10.6 Rest power
Same parameter, but in mAh
Attention: the battery-full parameters are only representative when used in lithium battery-only
systems. When using a solar panel or external power
they won’t work. Their readings are not
true in this case. (this is because the battery is charged, whithout updating the calculations).
This is no problem, because in these systems, the battery status is of minor importance. With solar
systems, keep track of the minimum battery voltage instead of rest capacity or rest power.
4.10.7 Processor Temperature
Temperature of internal processor, which is related to the ambient temperature. Because the data logger
is very low power, and is only awake for a short time, the processor won’t get warm, and has practically
the same temperature as the environment. You can use this sensor for approximation measurements.
And also for diagnostic measurements.
4.10.8 Average Voltage
The voltage of the connected battery, averaged to get a real practical value
4.10.9 Max Voltage
Battery Voltage, maximum of interval
4.10.10
Min Voltage
Battery voltage, minimum value of interval. This parameter is very practical to use for diagnostic
measurements. Particularly when the modem sends data, the battery voltage will drop, and must not get
too low (2 Volts) This parameter is a nice quality figure for the status of the battery. When this value drops
a lot, it is wise to exchange the battery, or charge it. With solar systems, in the dark months, this can be
an issue, and this can be solved with the aid of good weather.
4.10.11
Average, Max, Min current
Same as above, but for current. The data-send sessions are clearly recognized by the use of these
parameters.
4.10.12
Operating cycle
This virtual sensor measures the time that the data logger is awake, performing tasks. This gives also
good diagnostic information. When i.e. the GSM signal is very weak, retries will occur, and the session
will consume more time. This parameter provides information on the proper operation of a system. The
Operating cycle is measured in seconds.
4.10.13
Free disk space
Shows the remaining disk space on the SD Card. In most cases there is sufficient space left.
