Bedienungsanleitung Benning IT 110 (Seite 9 von 80) (Englisch)

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2.3 Charging

The battery is charged whenever the power supply adapter is connected to the BENNING IT 110/

BENNING IT 120 B. In-built protection circuits control the charging procedure and assure maximal

batterylifetime.Powersupplysocketpolarityisshowningure2.1.

Abb. 2.1: Power supply socket polarity

Note:

- Use only the power supply adapter delivered by the manufacturer or distributor of the

BENNINGIT110/BENNINGIT120Btoavoidpossiblereorelectricshock.

2.4 Precautions on charging of new battery cells or cells unused for a longer

period

Unpredictable chemical processes can occur during charging of new battery cells or cells that

were unused for a longer period of time (more than 3 months). Ni-MH and Ni-Cd cells are affec-

ted to a various degree (sometimes called as memory effect). As a result the operation time of the

BENNINGIT110/BENNINGIT120Bcanbesignicantlyreducedattheinitialcharging/dischar-

ging cycles.

Therefore it is recommended:

- to completely charge the battery (at least 14h with in-built charger).

- to completely discharge the battery (can be performed with normal work with the instrument).

- to repeat the charge/discharge cycle for at least two times (four cycles are recommended).

When using external intelligent battery chargers one complete discharging/charging cycle is per-

formed automatically.

After performing this procedure a normal battery capacity is restored. The operation time of the

BENNINGIT110/BENNINGIT120Bnowmeetsthedatainthetechnicalspecications.

Note:

- The charger in the BENNING IT 110/ BENNING IT 120 B is a pack cell charger. This means

that the cells are connected in series during charging so all of them must be in a similar state

(similarly charged, same type and age).

- Even one deteriorated battery cell (or just of an another type) can cause an improper charging

oftheentirebatterypack(heatingofthebatterypack,signicantlydecreasedoperationtime).

- If no improvement is achieved after performing several charging/discharging cycles, the state of

individual battery cells should be determined (by comparing battery voltages, checking them in

a cell charger, etc). It is very likely that only some of the cells are deteriorated.

- The effects described above should not be mixed with normal battery capacity decrease over

time. All charging batteries lose some of their capacity when repeatedly charged/discharged.

The actual decrease of capacity versus number of charging cycles depends on the battery type

andisprovidedinthetechnicalspecicationfromthebatterymanufacturer.

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