Section 11
ELECTRICAL SYSTEM
Subsection 02
(CHARGING SYSTEM)
11-02-4
SMR2002-085_11_02A.FM
Battery Testing
There are 2 types of battery tests: electrolyte read-
ing and load test. An electrolyte reading is made
on a battery without discharging current. It is the
simplest and commonly used. A loaded test gives
more accuracy of the battery condition.
Electrolyte Reading
Check charge condition using either a hydrometer
or multimeter.
With a multimeter, voltage readings appear in-
stantly to show the state of charge. Always re-
spect polarity. A fully charge battery will have a
reading of 12.6 Vdc.
A hydrometer measures the charge of a battery in
terms of specific gravity of the electrolyte. A fully
charge battery will have a specific gravity between
1.265 to 1.280.
Most hydrometers give a true reading at 21
°
C (70
°
F).
1. Specific gravity 1.265
In order to obtain correct readings, adjust the initial
reading by
adding
.004 points to the hydrometer
readings for each 5.5°C (10°F)
above
21°C (70°F)
and by
subtracting
.004 point for every 5.5°C
(10°F)
below
21°C (70°F).
This chart will be useful to find the correct reading.
Load Test
This is the best test of battery condition under a
starting load. Use a load testing device that has an
adjustable load.
Apply a load of 3 times the ampere-hour rating of
the battery. At 14 seconds into the test, check bat-
tery voltage; if battery is in good condition, it will
have at least 10.5 Vdc.
A17E0JA
1
ELECTROLYTE
TEMPERATURE
OPERATION TO
PERFORM
°C
°F
38
32
27
100
90
80
.012
.008
.004
Add
to the
reading
21
70
CORRECT READING
16
10
4
- 1
60
50
40
30
.004
.008
.012
.016
Subtract
from the
reading
EXAMPLE NO. 1
TEMPERATURE ABOVE 21°C (70°F):
Hydrometer reading: 1.250
Electrolyte temperature: - 1°C (30°F)
Subtract .016 Sp. Gr.
Corrected Sp. Gr. is 1.234
EXAMPLE NO. 2
TEMPERATURE ABOVE 21°C (70°F):
Hydrometer reading: 1.235
Electrolyte temperature: 38°C (100°F)
Add .012 Sp. Gr.
Corrected Sp. Gr. is 1.247
SPECIFIC GRAVITY READING
USING A HYDROMETER
STATE OF
CHARGE
ELECTROLYTE
TEMPERATURE
27°C (80°F)
4°C (40°F)
100%
1.26/1.27
1.27/1.28
75%
1.21/1.22
1.22/1.23
50%
1.16/1.17
1.17/1.18
25%
1.12/1.13
1.13/1.14
0%
1.10 or less
1.11 or less
www.SeaDooManuals.net
Содержание GTX 4-TEC 5573 2002
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