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24.1.9. The menu item 'Warning LED'
In this menu item the following options can be selected:
The warning LED is switched on. When a warning signal will be given is
explained in detail in the chapter "The warning LED 'Attention armed' ".
Warning LED (!):
Off
No warning signal will occur.
24.1.10. The menu item 'Battery measurement'
This additional feature is used for measuring the capacity.
The menu items accumulator capacity and accumulator power measure very quickly the actual
charging level of the battery and the ability of the battery to deliver current. Basically the battery
voltage is being monitored for these measurements.
The amount of energy an accumulator can store is decreasing during the aging process. Many factors
affect this deterioration such as the chemical aging process itself, the storage temperature, the
number and deepness of discharge cycles.
Possibly the amount of energy the battery can store is much less after some years of ageing than it
was initially. However the battery will show high results as a percentage value after charging due to
the fact that the off-load voltage is still high. In principle the percentage value refers always to the
amount of energy which can be stored in the particular battery. The loss in capacity becomes
noticeable only in a shorter operation time. The test results in the menu are falling faster accordingly.
To measure the accumulator capacity precisely it was necessary to send the device to the
manufacturer for an accurate battery test procedure. With this useful function you can do this battery
measurement with precise capacity metering yourself at the device. In the end the result is being
displayed in mAh and as a percentage value by which you can easily decide if the battery needs to be
replaced.
Including a full charge before and after the discharge cycle this procedure requires approx. three days.
Proceed this way to perform an accumulator capacity measurement:
Position the device evenly and connect the supplied charging unit. Establish a reliable power supply
for the charging unit. Power failures should be avoided. In this case the test sequence will be
cancelled to prevent deep discharges and the risk of damaged batteries which could occur in this
situation. The ambient room temperature should be between 15 and 25 °C.
Invoke this menu item. You will see the following on the screen:
You can start the test sequence by activating 'Up'. You will skip this menu
item with 'Mode' or 'Down'.
Please connect
charging unit!
After starting the test sequence the device checks if the charging unit is
supplying charging current. You will see this message if the charger is not
yet connected or if the charger has no mains supply. Establish proper
charging now and remain the charger connected permanently.
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