Magnum Energy Battery Monitor Kit ME-BMK - Manual (Page 30)

© 2010 Magnum Energy, Inc. 26
Using the ME-RTR Router with the BMK
Figure 5-4, ME-RTR METER Menu Map (Displays w/BMK Settings)
METER
Battery Monitor
Status AmpHrs I /O
DC Volts DC Amps
Port # Screen
METER
04B DC Volts-BMK
** VDC
P#A View BMK Meter
04C DC Amps-BMK
** ADC
P#A View BMK Meter
04D AH In/Out
** AHrs
P#A View BMK Meter
04F Total kAHrs Out
** kAH
P#A View BMK Meter
04G Minimum VDC
** VDC
P#A View BMK Meter
04E Resetable AHrs
**Ahrs
P#A View BMK Meter
04H Maximum VDC
** VDC
P#A View BMK Meter
BMK Home screen
(see ME-RTR Owner’s Manual
for info on accessing)
04A BMK SOC
** %
P#A View BMK Meter
5.5 Operating the BMK using the ME-RTR
This section explains how the ME-BMK battery monitor works, and how to
use the Magnum Energy RTR router to obtain battery bank information. It
also covers the various LCD displays that are related to the battery monitor
and the status of the Sense Module’s LED indicator.
Info: Battery monitor menu items are accessed via the RTR router’s
BMK Home screen. For information on how to access the BMK
Home screen or otherwise navigate the RTR router, see the ME-RTR
(PN: 64-0020) Owner’s Manual.
5.5.1 How does the Battery Monitor (ME-BMK) Operate? The
ME-BMK (battery monitor kit) uses a precision resistor known as a shunt to
measure current fl ow into and out of the battery. The shunt provides a small
voltage to the Sense Module that is proportional to the current fl ow. When
current starts fl owing into or out of the battery, the Sense Module measures
the current fl ow and determines the amount of current removed from and
returned to the battery. The amount of current (or amp-hours) removed or
returned is displayed on the router as the AH I/O (Amp-Hours In/Out). The
AH I/O number is compensated by a charging effi ciency value that accounts
for energy loses while charging, and is one of the factors used to determine
the battery’s State Of Charge (SOC).