Benning IT 120 B 044102 Manual De Usuario

9

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 figure 2.1.

+

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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 fire or electric shock.

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 significantly 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 specifications.

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, significantly 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 specification from the battery manufacturer.