Using a BMK: Setup
Page 108
©
2017 Sensata Technologies
9.0
Using a BMK
This section discusses how to set up, operate and troubleshoot the BMK using the ME-ARTR
router. Refer to the mini-index below to direct you to the appropriate section.
9.1
ME-BMK Setup (with the ME-ARTR)
page 108
9.2
ME-BMK Operation/Monitoring (with the ME-ARTR)
page 109
9.3 ME-BMK
Troubleshooting (with the ME-ARTR)
page 115
9.1
ME-BMK Setup (with the ME-ARTR)
The BMK SETUP menus can be accessed from the BMK or System Home screens (see Figure 9-2).
Two settings are available in the BMK, the
fi
rst sets the battery ef
fi
ciency (
05A Charge Ef
fi
ciency
)
and the second sets the capacity of the battery bank (
05B Battery AmpHrs Size
).
Info:
To access the BMK Home screen,
fi
rst press and hold the METER button (~3
seconds) to display the System Home screen. From the System Home screen, press
the PORT button, or rotate the SELECT knob to the port# where the BMK is connected.
• SETUP: 05A Charge Ef
fi
ciency
– The
Charge Ef
fi
ciency
setting allows the battery monitor to
calculate the battery’s charge ef
fi
ciency. The charge ef
fi
ciency can be calculated automatically
using the
Auto
setting, or can be calculated based on a
fi
xed ef
fi
ciency value determined by
the user (see Figure 9-1).
Default setting:
Auto
Range:
Auto, 50-99%
What is Charge Ef
fi
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 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 battery’s inef
fi
ciencies while charging, a
charge ef
fi
ciency setting is provided. The charge ef
fi
ciency setting compensates the AH I/O (AHrs
In/Out) reading by ensuring the AHrs returned to the battery are greater than the AHrs removed.
Example:
AH I/O display reads “000”. When powering a 25-amp load for two hours, the display
will show “-050”. You have discharged 50 AHrs (2 x 25) from the battery. If the charge ef
fi
ciency
setting is 95%, then as you begin charging and return 50 AHrs, the AH I/O reading will be less
than zero—indicating that the AHrs removed have not been fully returned. The 95% charge
ef
fi
ciency setting requires 52.5 AHrs (50/95) to be returned before the AH I/O returns to 0.
9.1.1
Adjusting the Charge Ef
fi
ciency Setting
The battery monitor is shipped with the charge ef
fi
ciency set to
Auto
. This allows the battery
monitor to automatically calculate variables that affect the charging ef
fi
ciency such as battery
type, battery age, and how the batteries are maintained—which is not always constant. With the
Auto
setting, the ef
fi
ciency is recalculated each time the batteries reach a 100% state of charge.
This setting can also be manually adjusted from 50% to 99% if the battery’s charge ef
fi
ciency is
known. When using a setting other than the
Auto
setting, the battery monitor uses the manual
setting to calculate the AH I/O display. For example, if you set the charge ef
fi
ciency to 90%
and 100 AHrs are removed from the battery, the
AH Net
display would read
000
only after 111
AHrs have been returned to the battery. However, if the charge ef
fi
ciency is manually set and
inaccurate, the SOC information is more inaccurate with every charge. Thus, continually monitor
the AH I/O reading (along with the SOC display) under the router’s METER button.
To access the AH I/O reading:
From the BMK Home screen, press the METER button. The
05A BMK SOC
display appears. Turn the SELECT knob until the
05D Amps Hours 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%.
Summary of Contents for ME-ARTR
Page 1: ...ME ARTR Advanced Router Owner s Manual Version 4 0 ...
Page 181: ...NOTES ...