Baroness LM2700, Service Manual

Page: 156 / 325

Special Tool
Special tools list
No use of special tools is required.
Measurement
Battery
Measurement of Battery Specific Weight
Specific weight of electrolyte tends to reduce in
linear proportion with the discharged electrical
quantity of the battery and so checking the
specific weight of electrolyte with a hydrometer
can tell the remaining capacity of the battery.
Temperature compensation is required for the
specific weight measured with a hydrometer.
The standard temperature for the specific
weight of battery electrolyte is 20 ° C, and the
specific weight increases or decreases by
0.0007 in accordance with the temperature
change of 1 ° C. Thus it can be compensated
by the following formula.
S20 = St + 0.0007(t - 20)
1
2
3
lyp58z-002
Measurement of Battery Specific Weight_001
1 Specific weight converted for 20 ° C
2 Measured specific weight
3 Fluid temperature at measurement
Specific weight and remaining capacity of battery
Specific weight
(20 ° C)
Discharged
electrical quantity
(%)
Remaining
capacity (%)
1.28 0 100
1.24 25 75
1.20 50 50
Specific weight and remaining capacity of battery
Specific weight
(20 ° C)
Discharged
electrical quantity
(%)
Remaining
capacity (%)
1.16 75 25
1.12 100 0
Measurement of specific weight of 12V battery
Check all the cells after charge.
Replace it when the specific weight is 1.225
or less, or gap of that between each cell is
0.05 or more.
1
lyp58z-001
Measurement of Battery Specific Weight_002
1 Cell
Battery charging
Follow this procedure to fully charge the
battery.
Warning
When charging the battery, do not use a
current in excess of one tenth of the rated
current. With regard to the maximum
recommended charging current, follow the
battery manufacturer
’
s instructions.
Caution
If the battery gets extremely hot or releases a
significant amount of gas during charging,
unplug the battery charger at regular
intervals.
Use a taper battery charger, which
automatically reduces the charging rate
during charging.
1.
2.
1.
LM2700
Electrical system
Page 6-8 Special Tool