20
5.906-510.0 Rev. 00 (12/10)
The battery must be fully charged prior to the inspec-
tion to obtain a reliable result.
The following checks must then be made:
The idle voltage provides a measure for the charging
status of a maintenance-free battery. If this value is
below a certain limit, this indicates that the battery is
not charged.
You can estimate the approximately available charge
from the idle voltage.
The idle voltage should reach at least the following
limit values:
6 V battery block ……….6.15 volts;
12 volt battery block …12.30 Volt
If these values are not reached, the battery must be
charged first.
Caution: The battery terminals must be checked prior
to the load test. The battery terminals must always be
clean and tight.
Switch the appliance on, start operating the suc-
tion turbine and the cleaning head on an insensi-
tive floor.
Important: The consumers must run continuously
during this test.
The load test can also be performed while the suc-
tion turbine is turned on.
Measure the battery voltage of each individual bat-
tery block several times with the voltmeter/multim-
eter and record it.
Measure the current during the voltage measure-
ment using the ammeter and record it.
The battery block with the lowest battery voltage
must be replaced if it is outside the tolerance val-
ues.
See item "Limit value of battery voltage between
the individual battery blocks".
If this procedure still does not indicate clearly that
there is a faulty cell, the third measurement must be
performed after the second load test.
Use a voltmeter / multimeter to measure and
record the battery voltage of every individual bat-
tery block.
Measure the current using a clip-on ammeter dur-
ing the voltage measurement and record it.
Operate the appliance until the discharge end volt-
age / the total discharge protection shuts the appli-
ance off. Here, several measurements should be
performed and recorded.
Result:
In case of a problem, one or more battery blocks /
battery cells will be significantly different from each
other so that the fault can be pinpointed without
doubt.
With all measurements, the difference must not
exceed the following voltage under load:
Exide batteries:
between the 6 volt battery blocks 0.1 volts
between the 12 volt battery blocks 0.2 volt
Hoppecke batteries:
between the 6 volt battery blocks 0.2 volts
between the 12 volt battery blocks 0.4 volt
Measurement - idle voltage:
Measure the idle voltage with charged battery without
consumers.
6
Check the maintenance-free batter-
ies
6.1
1. Measurement - idle voltage
12 volt battery
block
6 volt battery
block
Charge approx.
> 12.80 Volt
> 6.42 Volt
100 %
> 12.55 Volt
> 6.30 Volt
75 %
> 12.32 Volt
> 6.20 Volt
50 %
> 12.18 Volt
> 6.00 Volt
25 %
< 12.00 Volt
< 6.00 Volt
totally dis-
charged
6.2
2. Measuring the battery under load
6.3
3. Measuring the battery under load
6.4
Limit value – battery voltage between the
individual battery blocks
6.5
Battery measuring log - maintenance-free
battery
Battery
block 1
Battery
block 2
Battery
block 3
Battery
block 4
Battery
block 5
Battery
block 6
