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10 HISTORY MENU
To know the history of your battery bank can be very
useful. It will help you to check if the battery capacity
suits the application and when the battery needs to
be replaced. For this you need to know the number
Message
Description
Standard hist
Days running
The total number of days since the MasterShunt was powered.
Days since low
This function tells you when the battery alarm was triggered for the last time.
See chapter 11 for explanation of the battery alarm function.
Last time 100%
The number of days since the battery bank was charged up to 100% for the last time.
To prevent damage the batteries must be charged to the full 100% regularly, at least
every 30 days.
Battery usage
The total number of charging cycles of the battery bank.
Battery abuse
Slow and deep discharges below the battery's end voltage can reduce the expected
lifetime of your batteries dramatically. This screen shows the number of battery abuse
cycles. A large number of abuse cycles might indicate small users that stayed
connected during a long period (for instance during wintertime). Get your electrical
installation examined by a qualified installer if abuse cycles happen more than once!
Discharged hours
The total number of hours (after a delay of 12 hours) when the SOC of the battery
bank was below 35%. This value should be as low as possible, as batteries should be
recharged immediately after a discharge.
Calculated CEF
The CEF that was calculated for the battery bank. This value is used for the
calculation of the consumed Amphours and the time remaining function (chapter 7),
See chapter 13.2 for explanation of the CEF.
Total consumed
The total amount of Amphours consumed from the battery bank. It is like the km
counter of your car. But like a car, not only the number of km's tell something about its
condition. The condition is also influenced by the way the car was treated. So it does
for your batteries.
Restarts
Number of resets
The number of times the setup has been reset. Factory setting = 0. See chapter 11 for
instructions how to reset the setup. Resetting clears all history values except for this
counter which is increased by one.
Power failures
Counts the number of times the MasterShunt has been disconnected from the battery.
Averages
Avg. discharge
The average discharge of the battery bank. This value should be less than half of the
installed battery capacity, else the capacity installed is too low.
Min/max history
Lowest Ah
Shows the deepest discharge. The deepest discharge should never be below the
rated capacity of the battery as specified by the battery manufacturer.
Volt at low Ah
Shows the voltage at the moment of recording the deepest discharge.
Highest voltage
Shows the highest voltage that was recorded. This voltage should never exceed the
maximum charging voltage as specified by the battery manufacturer.
> 100A [s]
Total amount of seconds the current has exceeded 100A since first start up.
> 200A [s]
Total amount of seconds the current has exceeded 200A since first start up.
> 500A [s]
Total amount of seconds the current has exceeded 500A since first start up.
EN / MasterShunt / February 2011
of battery charging cycles and the efficiency (C.E.F.)
of the battery. The memory back up system of the
MasterShunt saves this data even if the battery was
completely discharged or disconnected.
HISTORY MENU
17
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