Magnum Energy ME-BMK Owner's Manual - page 13
©2007 Magnum Energy Inc.
9
Setup
3.2 Adjusting the Charge Effi ciency Menu Item
The Charge Effi ciency setting allows the battery monitor to calculate the
battery’s charge effi ciency. The charge effi ciency can be calculated automati-
cally using the Auto setting or can be manually programmed by the user.
The battery monitor is shipped with the Charge Effi ciency setting set to Auto.
This selection 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. When the Auto
selection is used, the effi ciency is recalculated each time the batteries reach
a 100% State of Charge.
This setting can also be manually set from 50% to 97% if the battery’s
charge effi ciency is known. When using a Charge Effi ciency 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-hours 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 state-of-charge
information would be more inaccurate with every charge. For this reason,
continually monitor the ‘AH I/O’reading under the 03 BM: Meters menu.
After several charge and discharge cycles (below 80% SOC), the ‘AH I/O’
reading should be slightly positive when the 02 BM: SOC display reads 99%.
If this reading is below 000 (negative number) when the 02 BM: SOC display
reads 99%, then increase the Charge Effi ciency setting. If you fi nd that the
‘AH I/O’ reading is substantially above zero when the 02 BM: SOC display
reads 99%, then decrease the Charge Effi ciency setting.
Figure 3-2, Adjusting the Charge Efficiency Menu Item
3.3 Check the SETUP: 03 Batt AmpHrs Setting
It’s important that the SETUP: 03 Batt Amphrs setting is correct or the calcula-
tions used to determine the battery’s 02 BM: SOC display will be inaccurate.
To check this setting, press the SETUP pushbutton on the ME-RC remote con-
trol and rotate the ‘SELECT’ knob until the display shows the 03 Batt Amphrs
menu. When the 03 Batt Amphrs menu is displayed, press the ‘SELECT’ knob
to display the present 03 Batt Amphrs setting.
Usually battery capacity ratings tend to be optimistic and decrease at lower
temperatures, so this setting should be less than the published 20-hour Amp-
Hour (AH) capacity of the battery bank. After determining the 20-hour AH
capacity, adjust this setting slightly on the low side (a smaller value).
Info: For more information on this setting, see the ME-RC Owner’s
Manual (PN: 64-0003)
press to save
METER
press
Status…
05 BM: SETUP
rotate to
press to select
rotate to
desired
selection :
Status ...
Chg Eff= Auto
Status ...
Chg Eff= 60%
Status...
Chg Eff= 50%
Status ...
Chg Eff= 96%
Status ...
Chg Eff= 97%
.......
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