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Discharge Test Temperature Correction
Below 80° (26.7° C)
Correction
° F
° C
Factor
75
23.9
1.025
70
21.1
1.050
65
18.3
1.075
60
15.6
1.100
55
12.8
1.125
50
10
1.150
45
7.2
1.175
40
4.4
1.200
7.14 BUFFER BATTERY WIRING _________________________________________________
Refer to the following diagram for buffer battery wiring.
After battery cables are properly installed and
torqued, the use of standard battery terminal anti
corrosion spray is recommended.
!
WARNING
Use care when using tools around the battery
terminals, and when possible, use insulated tools.
Always
disconnect
connecting or disconnecting battery cables.
7.15 BUFFER BATTERY TESTING ________________________________________________
Testing batteries can be complex and there are many
application specific variables that cannot be considered
in one simple test. This section is a guide to help you
determine the over all condition of the buffer batteries.
Contact you Jacobsen Dealer for assistance.
1. Test Preparation
a. Check that battery cables are in good condition.
Replace damaged or broken cables.
b. Check that all terminal connections are tightened
to the proper torque.
c.
Fully charge the buffer batter pack.
Above 80° (26.7° C)
Correction
° F
° C
Factor
85
29.4
0.975
90
32.2
0.950
95
35
0.925
100
37.7
0.900
105
40.6
0.875
110
43.3
0.850
115
46.1
0.825
120
48.9
0.800
125
51.7
0.775
130
54.4
0.750
135
57.2
0.725
power
connectors
Battery Type
Trojan T890
before
d. Disconnect the large blue Anderson plug to
remove all load from the battery pack.
e. Let the batteries rest for at least 1/2 to 1 hour
after the charge is complete.
2. Open circuit voltage test.
a. Check and record open circuit voltage of each
battery. All batteries in a good set should be
above 12.7 volts when fully charged.
b. If all of the batteries are below 12.1 volts, the
buffer battery pack has failed, Replace the entire
set of batteries.
BATTERIES
Battery Discharge Rates
(48 Volt System)
Discharge time at 80° (26.7° C)
Number or complete discharge and
recharge cycles from new
0-50 Cycles
95 minutes
7
50 Plus Cycles
132 minutes
Figure 7E
en-61
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Troubleshooting
