BATTERIES 7
en-61
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.
Figure 7E
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.
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.
Discharge Test Temperature Correction
Below 80° (26.7° C) Above 80° (26.7° C)
° F ° C
Correction
Factor
° F ° C
Correction
Factor
75 23.9 1.025 85 29.4 0.975
70 21.1 1.050 90 32.2 0.950
65 18.3 1.075 95 35 0.925
60 15.6 1.100 100 37.7 0.900
55 12.8 1.125 105 40.6 0.875
50 10 1.150 110 43.3 0.850
45 7.2 1.175 115 46.1 0.825
40 4.4 1.200 120 48.9 0.800
125 51.7 0.775
130 54.4 0.750
135 57.2 0.725
Battery Discharge Rates
(48 Volt System)
Discharge time at 80° (26.7° C)
Battery Type
Number or complete discharge and
recharge cycles from new
0-50 Cycles 50 Plus Cycles
Trojan T890 95 minutes 132 minutes
WARNING
Use care when using tools around the battery
terminals, and when possible, use insulated tools.
Always disconnect power connectors before
connecting or disconnecting battery cables.
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