A 1179, A 1257, A 1395 Flex current clamps
7
6 Using A1179/A1257/A1395 Flexible Current
Clamps
6.1 Battery and charging
The A1179/A1257/A1395 uses two AA size alkaline or rechargeable Ni-Cd or Ni-
MH battery cells. Nominal operating time is declared for cells with nominal capacity of
2200 mAh. In case the battery is weak, the A1179/A1257/A1395 indicates this with
Low
bat
LED blinking.
The battery is charged whenever the power supply adapter is connected to the
A1179/A1257/A1395. Internal circuit controls charging assuring maximum battery
lifetime. Power supply socket polarity is shown in Picture 6.1.
+
-
Picture 6.1: Power supply socket polarity
The A1179/A1257/A1395 automatically recognizes connected power supply adapter
and controls charging. After 24 hours of continuous charging it is switched off.
Before opening battery compartment cover disconnect all measuring
accessories connected to the clamps and power off the A1179/A1257.
Insert cells correctly, otherwise the A1179/A1257/A1395 will not operate and the
battery could be discharged.
Remove all battery cells from the battery compartment if the
A1179/A1257/A1395 is not used for longer period.
Do not charge alkaline battery cells!
Take into account handling, maintenance and recycling requirements that are
defined by related regulatives and manufacturer of alkaline or rechargeable
batteries!
Use only power supply adapter delivered from manufacturer or distributor of the
test equipment to avoid possible fire or electric shock!
Do not use battery cells with different capacity.
6.1.1 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 (more than 3 months). Ni-MH and Ni-Cd
battery cells are affected to capacity degradation (sometimes called as memory effect).
As a result, the A1179/A1257/A1395 operation time can be significantly reduced.
Recommended procedure for recovering battery cells:
