Anton/Bauer DUAL 2722 - Manual (Page 9)

DDM (DIAGNOSTIC/DISCHARGE MODULE)
A standard feature with the DUAL 2722, the DDM completes a battery management
system, capable of testing battery capacity and identifying battery anomalies before
they appear in the field.
The DDM will perform a standard or a 24 hour test. The standard test is a full
charge-discharge-full charge routine, which will identify the capacity of the battery
and indicate any performance issues, such as low battery voltage indicating a shorted
cell. The 24 hour test is a full charge-wait 24 hours-discharge-full charge routine
which will identify any excessive self-discharge or serious cell imbalance condition.
Test time will vary with battery condition and watt hour rating. The standard test will
require a minimum of 6 hours to a maximum of about 12 hours. The 24 hour test will
require an additional 24 hours as the battery undergoes a 24 hour rest time to identify
self-discharge anomalies. It is recommended that the 24 hour test be performed only on
weekends or when the battery is not scheduled to be used for 2-3 days.
The standard test is adequate for virtually all conditions to verify the capacity of the
battery before taking it into the field. The 24 hour test need only be performed on a
battery, typically an older one (2 years or more), which may have exhibited
questionable performance.
Note: The DDM test mode should be used sparingly. Remember that a cycle
performed in test is part of the battery’s overall life. Anton/Bauer
suggests that a typical management routine for your batteries might be to
test them once every 90 days during the first two years and every 60 days
thereafter. If a record is kept of the battery’s performance on test, any
anomaly will become apparent from the record. It is not necessary to
fully discharge an Anton/Bauer battery before recharging. The
PowerCharger’s charging routines and the high voltage design of the
Anton/Bauer batteries precludes the problems which old 12 volt batteries
had in the past. Don’t waste battery life on unnecessary testing.
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