TT Quattro Coupe V6-3.2L (BHE) (2005)
Battery: Component Tests and General Diagnostics
Battery Specific Gravity, Measuring In All Cells
Battery Specific Gravity, Measuring In All Cells
Special tools, testers and auxiliary items required
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Refractometer T10007 or
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Commercially available hydrometer
Prerequisites
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The temperature of the battery acid must be at least +10 degrees C.
Procedure
In conjunction with battery test See: Diagnosis and Testing/Battery, Testing With Midtronics Battery/Starting/Charging System Analyzer MCR340A,
the specific gravity measurement gives information about the condition of the battery.
CAUTION:
Risk of injury from direct exposure to battery acid.
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Follow accident prevention regulations when working with battery acid
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Wear protective eyewear and clothing
NOTE: Specific gravity of electrolyte can be checked immediately after charging battery.
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Remove all battery cell sealing plugs.
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Dip hydrometer into battery cell and siphon off enough electrolyte until float floats freely in electrolyte.
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The higher the specified weight of the siphoned battery acid, the higher the float will float.
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The acid density of the electrolyte can be read off in cu.kg/dm on the hydrometer scale (specified density of the battery acid).
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Compare hydrometer reading to values given in table.
Specified acid density must be at least 1.24 cu.kg/dm in moderate climate zones. If the acid density in all battery cells is too low:
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Charge battery and repeat acid density test.