Magnum Energy Battery Monitor Kit ME-BMK - Manual (Page 28)

© 2010 Magnum Energy, Inc. 24
Using the ME-RTR Router with the BMK
5.2 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 5-2).
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.
press to
save
SETUP
press
05A Charge Eff
Auto
P## View BMK Setup
rotate to:
press to adjust
setting
rotate to
desired
setting:
Set Charge Eff
Auto
P## edit BMK Setup
Set Charge Eff
50 %
P## EDIT BMK Setup
Set Charge Eff
97 %
P## EDIT BMK Setup ....
From the BMK
Home screen:
If the charge effi ciency is manually set and inaccurate, the SOC informa-
tion will be more inaccurate with every charge. For this reason, continually
monitor the AH I/O reading under the router’s METER pushbutton.
To access the AH I/O reading: from the BMK Home screen, press the
METER pushbutton. The 04A BMK SOC display appears. Turn the SELECT
knob until the 04D AH In/Out menu appears.
After several charge and discharge cycles (below 80% SOC), the AH I/O
reading should be slightly positive when the SOC display reads 99%.
To view the SOC display: from the BMK Home screen, press the METER
pushbutton. The 04A BMK SOC menu appears. If the AH I/O reading is
below 000 (negative number) when the 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 SOC display reads 99%, then decrease
the charge effi ciency setting.
5.3 Adjusting the AmpHrs Setting
It’s important that the AmpHrs setting is correct or else the calculations used
to determine the battery’s SOC display will be inaccurate.
To adjust this setting: from the BMK Home screen, press the SETUP
pushbutton. Turn the SELECT knob until the 05B AmpHrs Size display
appears. Press the SELECT knob to access the Set AmpHrs Size function.
Turn the SELECT knob to adjust the AmpHrs setting. Press the SELECT
knob to select and save the new setting.
Figure 5-2, Adjusting the Charge Effi ciency Setting (ME-RTR)