B. Temperature correct each cell reading. For each
oF (5.5oC) above 80oF (26.7oC) add 0.004 to the
G. Take a voltage reading at 15 seconds, then re-
move the load.
10
specific gravity reading. For each 10oF (5.5oC) be-
low 80oF (26.7oC) subtract 0.004 from the specific
gravity reading.
H. Using the table below, determine the minimum
voltage for the cell temperature reading:
Example: Cell Temperature
Cell Gravity
100
(37.7
20
(11
ADD (conversion above)
Correction to 80oF (26.7oC)
100oF
1.245
oF minus 80oF equals 20oF
oC minus 26.7oC equals 11.0oC)
oF multiply by 0.004/10oF equals 0.008
oC multiply by 0.004/5.5oC equals 0.008)
Minimum
Voltage
Battery Electrolyte
Temperature
9.6
9.5
9.4
9.3
9.1
8.9
8.7
8.5
70oF (and up)
21.1oC (and up)
15.6oC
60oF
50oF
40oF
0.008
1.253
10.0oC
4.4oC
C. If the difference between the highest and lowest
cell specific gravity is 0.050 or greater or the lowest
cell specific gravity is less than 1.225, charge the bat-
tery. Charge at the recommended rate and time giv-
en in Charging or until all cells specific gravity is
30oF
20oF
–1.1oC
–6.7oC
10oF
0oF
–12.2oC
–17.8oC
1.225
or greater with the difference in specific gravity
between the highest and lowest cell less than 0.050.
If these charging conditions can not be met, replace
the battery.
I. If the test voltage is below the minimum, replace
the battery. If the test voltage is at or above the mini-
mum, return the battery to service.
3.
load tester.
Perform a high–discharge test with an adjustable
Charging
To minimize possible damage to the battery and allow
the battery to be fully charged, the slow charging meth-
od is presented here. This charging method can be ac-
complished with a constant current battery charger
which is available in most shops.
This is one of the most reliable means of testing a battery
as it simulates the cold–cranking test. A commercial bat-
tery load tester is required to perform this test.
CAUTION
CAUTION
Follow the manufacturer’s instructions when us-
ing a battery tester.
Follow the manufacturer’s instructions when us-
ing a battery charger.
A. Check the voltage across the battery terminals
prior to testing the battery. If the voltage is less than
NOTE: Using specific gravity of the battery cells is the
most accurate method of determining battery condition.
12.4
VDC, recharge the battery.
B. If the battery has been charged, apply a 150 amp
load for 15 seconds to remove the surface charge.
Use a battery load tester following the manufactur-
er’s instructions.
1.
specific gravity or open circuit voltage.
Determine the battery charge level from either its
Battery Charge
Level
Specific
Gravity
Open Circuit
Voltage
C. Make sure battery terminals are free of corrosion.
D. Measure the temperature of the center cell.
100%
75%
50%
25%
0%
1.265
1.225
1.190
1.155
1.120
12.68
12.45
12.24
12.06
11.89
E. Connect a battery load tester to the battery termi-
nals following the manufacturer’s instructions.
Connect a digital multimeter to the battery terminals.
F. Apply a test load of one half the Cranking Perfor-
mance (see Battery Specifications) rating of the bat-
tery for 15 seconds.
Reelmaster 2000–D
Electrical System
Page 5 – 27
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| Document Type | Service Manual |
| Language | English |
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