BATTERY DISCHARGER at constant current English
D01470-03 19
In every working condition, the lit up LED show which are the operating keys.
I: discharging current.
It is automatically set out at the minimum discharging value (1 or 2 ampere according to the model) and
therefore it is necessary to state it at the required value.
This value (constant discharge at 5 hours rating) is normally obtained dividing by 5 the battery capacity
expressed with C5. Example: C = 400Ah, I = 400/5 = 80A.
Vstop: Discharging stop voltage.
For safety reasons it is automatically set out at about 80% of Vbat and therefore it is necessary to change
it if does not correspond to the required value.
This value (constant discharge at 5 hours rating) is normally 1,7 Volt/cell.
Table of “I” values Table of “Vstop” values
C5 (Ah) I (A) Vnom (V) Vstop (V)
30 6 6 5,1
45 9 12 10,2
50 10 24 20,4
60 12 36 30,6
80 16 40 34
100 20 48 40,8
120 24 60 51
180 36 72 61,2
200 40 80 68
240 48 84 71,4
300 60 96 81,6
360 72 108 91,8
380 76 120 102
400 80 132 112,2
420 84 144 122,4
480 96 156 132,6
500 100 168 142,8
540 108 180 153
600 120 192 163,2
700 140 204 173,4
750 150 216 183,6
T: discharging time (automatic shut-off).
It is automatically set out at the maximum value equal to 9h and 59m and therefore it is necessary to
change it in case you require a partly discharge with timing shut-off.
The timer function with automatic shut-off can be disabled setting out the value 0h e 00m.
This operation is needed in case you foresee to employ the item for more than 10 hours (slow discharge).
It is usually not necessary to set out the time and it is sufficient to keep the value automatically set at 9h
and 59m.
4) Battery discharge
Start the discharge pressing the START/STOP key.
In this phase the display shows the following:
Vbat: refers to the battery voltage; it is a voltmeter in all respects.
Vstop: refers to the interrupting voltage of discharge.
I: shows the discharging current.
Ah: shows the discharged amperhours.
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