BATTERY DISCHARGER at constant current
English
D01470-03
21
Maintenance
Cleaning
In case of employ in especially dusty places, it is recommended to clean the equipment at regular
intervals by means of compressed air, since the fans necessary for its functioning draw in a lot of dust.
Current adjustment
In case of big differences among the value shown on the display and the one read by means of an
external ammeter, it is possible to adjust the current through the 2 trimmers placed on the main PCB.
We state below, step by step, the operations needed to execute correctly the re-alignment procedures:
1. Switch on the equipment for at least 15 minutes (without starting up the discharge).
2. Connect a battery which can support the maximum discharging current of the discharger .
3. Set an exact ammeter to measure the current externally.
4. Start up the discharge with the minimum discharging current of the discharger.
5. Operate on the trimmer “OFFSET” (TM1) to obtain the indicated value on the external ammeter equal
or the most similar to the one shown on the display of the discharger.
6. Start up the discharge with the maximum discharging current of the discharger.
7. Operate on the trimmer “IMAX” (TM2) to obtain
the indicated value on the external ammeter
equal or the most similar to the one shown on
the display of the discharger.
8. Verify with intermediate current levels the
correspondence of the values shown on the
instruments.
9. Repeat the operations indicated from the point
n.4 many times till you get a perfect final
alignment.
In case of model with double unit:
1. Align the main unit separately.
2. Connect the second unit and repeat the
alignment operations acting only on the trimmer
of the second unit.
Voltage compensation
In case of a modification of the supplying cable length, the voltage reading can be corrected through 2
little switches placed on the control board.
Four types of compensation can be selected by means of these switches:
1. no compensation
2. compensation “small” (as set by the factory)
3. compensation “medium”
4. compensation “big”
Such compensation should be verified experimentally, since it depends on how the battery has been
connected (terminal, thimble, clamps etc.).
U1
T
M
2
C
28
C26
NEGATIVO
R33
R32
R28
R27
R38
R36
R35
R34
R31
R30
R37
R40
R39
R29
HALL
C
32
C
33
C
31
C27
C
30
T
M
1
C29
TP
ZIVAN ZR51
TP
I MAX
OFFSET
4
3
2
1
ON
ON
ON
ON
1 2
1 2
1 2
1 2
