Equalizing Charge:
This charge is at a low rate and balan-
ces the charge in all of the cells. The equalizing charge is
normally given approximately once a month. It is a charge
at a slow rate for three to six hours in addition to the regular
charging cycle. Do not give an equalizing charge more than
once a week. The most accurate specific gravity measure-
ments for a charged battery will be after an equalizing
charge. If the specific gravity difference is more than 0.020
between cells of the battery after an equalizing charge,
there can be a defective cell. Consult your battery dealer.
Also see the service manual
Industrial Battery
2240 SRM
1, for additional information on the charging and mainte-
nance of a battery.
Specific
Gravity
Reading
Electrolyte
Temp.
Correction
Points
Correct Value
1.210
1.210
1.210
1.210
31 °C (87 °F)
27 °C (80 °F)
25 °C (77 °F)
18 °C (64 °F)
+0.003
+0.001
0.000
−0.004
1.213
1.211
1.210
1.206
+0.001 or −0.001 for each 2 degrees C from the 25-degree base
value.
Figure 42. Check Specific Gravity
Maintenance
192
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