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BATTERIES - TM-5-4210-233-14P-1_493
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Removal. - TM-5-4210-233-14P-1_495
TM 5-4210-233-14&P-1 4-114.  BATTERIES - Continued TYPICAL OPEN CIRCUIT VOLTAGE AND SPECIFIC GRAVITY VALUES CHARGE LEVEL SPECIFIC GRAVITY VOLTAGE 100% 1.265 12.68 75% 1.225 12.45 50% 1.190 12.24 25% 1.155 12.06 DISCHARGED 1.120 11.89 Adjust readings as follows for temperature correction: (5)  Using thermometer, measure temperature of each cell. (6)  If temperature is ABOVE 80°F (26.7°C), ADD .004 for every 10°F (5.5°C) increment above 80°F. (7)  If temperature is BELOW 80°F (26.7°C), SUBTRACT .004 for every 10°F (5.5°C) increment below 80°F. If specific gravity is less than 1.225 in all cells and/or cells vary more than 50 points, charge battery and retest.  If charging does not restore specific gravity to 1.225 or higher, replace battery. (8)  Make sure battery is fully charged. (9)  Remove cables from battery terminals as described below. CAUTION To   avoid   damage   to   battery   terminals,   do   not   use   alligator clamps to connect load to battery.  Connect leads to battery with bolted  cable  ends  and  use  switch  to  connect  and  disconnect load. (10)  Connect 290 amp load (0.041 W 4 kW rated resistor or carbon pile) in series with a switch across battery terminals as shown (a load tester that incorporates the lead and a voltmeter with it may be used).  Turn on switch and wait 15 seconds to remove surface charge.  Turn off switch. (11)  Wait 15 minutes after above test.  Connect voltmeter across battery terminals as shown.  Turn on switch.  After 15 seconds, read voltage and disconnect load. (12)  Compare voltage readings to following table: LOAD TEST BATTERY VOLTAGES Ambient 70°F 60°F 50°F 40°F 30°F 20°F 10°F 0°F Temperature 21°C 16°C 10°C 4°C -1°C -7°C -12°C -18°C Battery Voltage 9.6 9.5 9.4 9.3 9.1 8.9 8.7 8.5 4-365

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