It:
Tail current. When the charge current value is below this
percentage of the battery capacity (Cb), the battery can be
considered as fully charged. Make sure this is always greater
than the minimum current at which the charger maintains the
battery, or stops charging.
Tcd: Charged detection time. This is the time the charged-
parameters (It and Vc) must be met, in order for the battery to be
considered fully charged.
CEF: Charge Efficiency Factor. The Charge Efficiency Factor
compensates for the losses during charging. 100 % means no
loss.
PC: Peukert exponent (see chapter 2.3.2). When unknown it is
recommended to keep this value at 1.25. A value of 1.00 disables
the Peukert compensation. Contact your battery manufacturer for
the correct Peukert exponent for your battery.
Ith:
Current threshold. When the current measured falls below this
value it will be considered as zero Amps. With this function it is
possible to cancel out very small currents that can negatively
affect long term state-of-charge readout in noisy environments.
For example if an actual long term current is +0.05 A and due to
injected noise or small offsets the battery monitor measures –
0.05 A, in the long term the BMV can incorrectly indicate that the
battery needs recharging. When in this case Ith is set to 0.1, the
BMV calculates with 0.0 A so that errors are eliminated. A value
of 0.0 disables this function.
Tdt: Average time-to-go. Specifies the time window (in minutes) that
the moving averaging filter works with. Selecting the right time
depends on your installation. A value of 0 disables the filter and
gives you instantaneous (real-time) readout; however the
displayed values may fluctuate heavily. Selecting the highest time
(12 minutes) ensures that long term load fluctuations are included
in the time-to-go calculations.
DF: Discharge floor. When the state-of-charge percentage has fallen
below this value, the alarm relay will be activated. The time-to-go
calculation is also linked to this value. It is recommended to keep
this value at around 50.0 %.
ClS: Clear SOC relay. When the state-of-charge percentage has risen
above this value, the alarm relay will be de-activated. This value
needs to be greater than DF. When the value is equal to DF the
relay will not be activated depending on the state-of-charge
percentage.
11