Magnum Energy ME-BMK Owner's Manual - page 12
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©2007 Magnum Energy Inc.
Setup
3.0 Setup
This section provides information on the charge effi ciency setting and shows
you how to access/adjust this setting. Normally the ME-BMK Battery Monitor
(BM) automatically calculates the battery’s effi ciency, however you may want
to manually set the effi ciency.
Info: The factory default setting is Chg Eff: Auto, this setting al-
lows the charging effi ciency to be automatically calculated. In most
circumstances, the “Auto” setting will determine the best charge
effi ciency.
CAUTION: If you do not know your battery’s charging effi ciency,
leave this setting at the factory default setting, if this setting is
manually set and incorrect, the state-of-charge information would
be more inaccurate with every charge.
What is Charge Effi ciency? When a certain amount of energy is removed
or discharged from the battery, this removed energy will need to be returned
to keep the batteries at a 100% state of charge. As batteries are being
charged, they lose energy; either in the form of heat or while gassing. This
loss of energy while charging means the battery will not be fully charged if
you only return the current that was removed. To compensate for the batter-
ies ineffi ciencies while charging, a charge effi ciency setting is provided. The
charge effi ciency setting compensates the AH I/O (AmpHrs In/Out) reading
by ensuring the amphrs returned to the battery are greater than the amp-
hours removed.
For example, if your AH I/O display reads 000 and you begin powering a 25
amp load for two hours, the display will show -050. This indicates that you
have discharged 50 amp-hrs (2 x 25) from the battery. If the charge effi ciency
setting is set to 95%, then as you begin charging and return 50 amp-hrs, the
AH I/O reading will be less than zero, indicating that the amp-hours removed
have not been fully returned. The 95% charge effi ciency setting requires 52.5
amp-hours (50/95) to be returned before the AH I/O returns to 0.
3.1 Accessing the Charge Effi ciency Menu Item
On the ME-RC remote control, press the METER pushbutton and rotate the
‘SELECT’ knob until the display shows the 05 BM: SETUP menu. Once the 05
BM: SETUP menu is displayed, press the ‘SELECT’ knob to access the Charge
Effi ciency setting (see fi gure 3-1).
Figure 3-1, Accessing the Charge Efficiency Menu Item
Info: For additional information on navigating the remote display,
see the ME-RC Owner’s Manual (PN: 64-0003).
Info: See fi gure 4-1, METER Menu Map (ME-BMK Displays) for a
complete map of the menu items and adjustable settings available
for the ME-BMK using the ME-RC remote control.
METER
press
Status…
05 BM: SETUP
rotate to
press to select
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