MI 3102(H) BT
Eurotest
XE
Safety and operational considerations
11
2.2
Battery and charging
The instrument uses six AA size alkaline or rechargeable Ni-MH battery cells. Nominal
operating time is declared for cells with nominal capacity of 2100 mAh. Battery condition is
always displayed in the lower right display part. In case the battery is too weak the instrument
indicates this as shown in figure 2.1. This indication appears for a few seconds and then the
instrument turns itself off.
Figure 2.1: Discharged battery indication
The battery is charged whenever the power supply adapter is connected to the instrument. The
power supply socket polarity is shown in figure 2.2. Internal circuit controls charging and
assures maximum battery lifetime.
+
-
Figure 2.2: Power supply socket polarity
Symbols:
Indication of battery charging
Figure 2.3: Charging indication
Warnings related to safety:
When connected to an installation, the instruments battery compartment can contain
hazardous voltage inside! When replacing battery cells or before opening the
battery/fuse compartment cover, disconnect any measuring accessory connected to the
instrument and turn off the instrument,
Ensure that the battery cells are inserted correctly otherwise the instrument will not
operate and the batteries could be discharged.
Do not recharge alkaline battery cells!
Use only power supply adapter delivered from the manufacturer or distributor of the test
equipment !
Notes:
The charger in the instrument is a pack cell charger. This means that the battery cells
are connected in series during the charging. The battery cells have to be equivalent
(same charge condition, same type and age).
If the instrument is not to be used for a long period of time, remove all batteries from the
battery compartment.
Alkaline or rechargeable Ni-MH batteries (size AA) can be used. METREL recommends
only using rechargeable batteries with a capacity of 2100mAh or above.
Unpredictable chemical processes can occur during the charging of battery cells that
have been left unused for a longer period (more than 6 months). In this case METREL
recommends repeating the charge/discharge cycle at least 2-4 times.
If no improvement is achieved after several charge / discharge cycles, then each battery
cell should be checked (by comparing battery voltages, testing them in a cell charger,
etc). It is very likely that only some of the battery cells are deteriorated. One different
battery cell can cause an improper behaviour of the entire battery pack!
