MI 3290 Earth Analyser
Safety and operational considerations
11
2.2 Battery and charging of Li-ion battery pack
The instrument is designed to be powered by rechargeable Li-ion battery pack or with mains
supply. The LCD contains an indication of battery condition and the power source (upper left
section of LCD). In case the battery is too weak the instrument indicates this as shown in
Symbol:
Indication of low battery.
Figure 2.1: Battery test
The battery is charged whenever the power supply is connected to the instrument. The power
supply socket is shown in Figure 2.2. Internal circuit controls (CC, CV) charging and assures
maximum battery lifetime. Nominal operating time is declared for battery with nominal capacity of
4.4 Ah.
Figure 2.2: Power supply socket (C7)
The instrument automatically recognizes the connected power supply and begins charging.
Symbol:
Indication of battery charging
Figure 2.3: Charging indication
(animation)
Battery and charging characteristic
Typical
Battery type
VB 18650
Charging mode
CC / CV
Nominal voltage
14,8 V
Rated capacity
4,4 Ah
Max charging voltage
16,0 V
Max charging current
1,9 A
Max discharge current
2,5 A
Typical charging time
3 hours
