Storage Battery Systems SBS-6500 Battery Resistance Tester

Introduction
1.1. Battery Condition Determination
The SBS-6500 is designed to be your best tool for determining the state of health of your
battery systems or cells and tracking that history over the entire life of the systems. As
batteries age, impedance (internal resistance) values change in proportion to the condition
of the batteries performance capabilities. A rapid increase in impedance (internal resistance)
can indicate a failure is eminent in the near future.
In general, the impedance (internal resistance) value of a cell or battery will increase by 1.5
to 2 times from the initial value (reference value) when the battery is deteriorating. Regular
measurements for comparison will provide warning to take corrective actions prior to its
actual failure.

[Judgment of Health (Deterioration)]
 Lead acid storage batteries are common in that they all undergo the same type of plate
deterioration over the life span of the battery. This comes in the form of plate structural
losses and material corrosions which increase the resistance (impedance) inside the cell.
 Batteries of the same capacity may have very different initial impedance (internal
resistance) values due to the design, construction and physical number and size of the
plates. Comparisons should only be made against that manufacturer’s published values
or the original installation values for the system.
 The “warning” and “fail” values of batteries from different manufacturers is the same
however, it is a percentage change over the life of the battery as it ages.