Magnum Energy Battery Monitor Kit ME-BMK - Manual (Page 14)

© 2010 Magnum Energy, Inc. 10
Using the ME-RC50 Remote with the BMK
3.2 Adjusting the Charge Effi ciency Setting
The Charge Effi ciency setting allows the battery monitor to calculate the battery’s
charge effi ciency. The charge effi ciency can be calculated automatically using the
Auto setting, or can be manually programmed by the user (see Figure 3-2).
The battery monitor is shipped with the charge effi ciency set to Auto. This allows
the battery monitor to automatically calculate variables that affect the charging
effi ciency such as battery type, battery age, and how the batteries are maintained
– which is not always constant. With the Auto setting, the effi ciency is recalculated
each time the batteries reach a 100% state of charge.
This setting can also be manually adjusted from 50% to 97% if the battery’s
charge effi ciency is known. When using a setting other than the Auto setting, the
battery monitor will use the manual setting to calculate the AH I/O display. For
example, if you set the charge effi ciency to 90% and 100 amp-hrs are removed
from the battery, the AH Net display would read 000 only after 111AH have been
returned to the battery.
If the charge effi ciency is manually set and inaccurate, the SOC information will
be more inaccurate with every charge. For this reason, continually monitor the
AH I/O reading under the remote’s METER pushbutton.
To access the AH I/O reading: press the METER pushbutton, turn the SELECT
knob until the 03 BM: Meters menu appears, press the SELECT knob again,
and then turn the SELECT knob until the AH I/O: display appears.
After several charge and discharge cycles (below 80% SOC), the AH I/O read-
ing should be slightly positive when the SOC display reads 99%.
To view the SOC display: press the METER pushbutton, turn the SELECT knob
until the 02 BM: SOC menu appears. If the AH I/O reading is below 000 (nega-
tive number) when the SOC display reads 99%, then increase the charge ef-
fi ciency setting. If you fi nd that the AH I/O reading is substantially above zero
when the SOC display reads 99%, then decrease the charge effi ciency setting.
3.3 Adjusting the Batt AmpHrs Setting
It’s important that the Batt Amphrs setting is correct or else the calculations used
to determine the battery’s SOC display will be inaccurate.
ME-RC50 Remote (Revision 2.0-2.5): To adjust this setting, press the
SETUP pushbutton on the ME-RC50 remote control, and then rotate the
SELECT knob until the display shows the 03 Batt AmpHrs menu. When the
03 Batt AmpHrs menu appears, press the SELECT knob to display the
current Batt AmpHrs setting. Turn the SELECT knob to adjust the
Batt AmpHrs setting. Press the SELECT knob to select and save the new
setting.
•
Figure 3-2, Adjusting the Charge Efficiency Setting (ME-RC50)
press to
save
METER
press
Status…
05 BM: Setup
rotate to
press to select
(press x 2 for ME-RC50's
with Rev. 2.6 or later)
rotate to
desired
selection:
Status...
Chg Eff=Auto
Status...
Chg Eff= 60%
Status...
Chg Eff= 50%
Status...
Chg Eff= 97%
.......