Battery Test Evaluation - Bosch BAT 121 Instrucciones De Funcionamiento

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5.1.2

Battery test evaluation

BATTERY-TEST
TEST RESULT
VOLTAGE:
START CAPACITY:
BATTERY:
300A
DIN
The results from the Battery-Test provide the following
information:
R
Voltage
R
Start Capacity
R
Overall battery condition in the form of text:
$
Good battery
$
Good battery / Charge the battery
$
Charge the battery / repeat the Battery-Test
$
Battery unserviceable
$
Battery unserviceable / Short circuit between
battery cells
E provides access to graphical representation of
charge status, starting capacity and battery status.
STATE OF CHARGE:
0
50
START CAPACITY:
0
50
+
-
OK
Symbol
Battery condition
Good battery
+
-
OK
Good battery
+
+
-
-
Ah
OK
Charge the battery
Charge the battery
+
-
Ah
Repeat the Battery-Test
Battery unserviceable
+
-
Short circuit between
battery cells
Check parameters
?
+
-
i
The Start output indicates the ratio of the battery's
measured cold-start current to the entered cold-star-
ting current. The start output may exceed 100 %.
5.1.3
Notes on problems
Message
Action to be taken
Battery voltage
Switch off electrical equipment
interference: Switch off
(refer also to Section 4.3) and
engine / Radio off/ Elec-
repeat battery test
trical equipment off
Contact problems:
Check connection to battery posts
Check positive terminal /
and clean battery posts if necessary
Check negative terminal
Check parameter
Check parameter
and repeat battery test
Robert Bosch GmbH
12,91V
105%
GOOD
>0°C E
100%
100%
E
Operation | BAT 121 | 17
5.2
Alternator-Test
The Alternator-Test is carried out in 2 steps.
Step 1 "Regulator Volt"
The generator regulator ensures correct charging during
driving by regulating the final charging voltage (Regu-
lator Volt) of the battery. This final value is recorded
automatically by the BAT 121 as soon as the increase
in voltage reaches the steady state. This final state is
reached sooner when all consumers are switched off.
Step 2 "Ripple"
The battery voltage is characterised by the ripple of a
certain pattern from an intact alternating-current ge-
nerator. Test information is obtained by analysing this
pattern at idle speed in combination with a battery
capable of starting the engine and powering the rear-
window heater.
i
Carry out a Batter-test before conducting the Gene-
rator-Test. The connecting terminals of the battery
tester should be connected directly to the poles of
the battery for the Generator-Test as well.
5.2.1
Alternator test procedure
1. Start the alternator test with E.
2. Use the keys  and  to set the regulator tempera-
ture >0 °C or <0 °C for the Alternator-Test.
3. Then start the engine of the vehicle.
4. Switch off all consumers in the car for Step 1 "Regu-
lator Volt".
i
A result can be obtained more quickly for Regula-
tor Volt at a higher engine speed.
5. Switch on the rear-window heater as the consumer
for Step 2 "Ripple".
!
The engine must now turn over at the idling speed.
The following information is displayed by the battery
tester (example):
ALTERNATOR-TEST
TEST-RESULT
RIPPLE
GOOD
REGULATOR VOLT:
14.22V
GOOD
REGUL. TEMP
>0°C
BAT 121 | 17
| 17
en
|
1 689 979 792
2010-02-24

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