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User Instructions UM1M820BNA
Spec No. 1M820BNA (Model M820B) Issue AH, March 4, 2013
Spec No. 1M820DNA (Model M820D)
Chapter 3. Local Display Menus 99
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
AC Fail Test: Enables or disables starting a battery discharge test during an AC input
failure condition.
Planned Tests: Number of planned battery discharge test per year. A "0" setting disables
the planned test feature.
Test 1 (M-D Hr): Setting for when planned battery discharge test #1 occurs. Note that
there can be up to (12) battery discharge tests per year.
Const Curr Test: Enables or disables a Constant Current Battery Discharge Test. During
this test, the Controller automatically adjusts the rectifiers output voltage to maintain the
battery discharge current at a preset value "ConstCurrT Curr".
ConstCurrT Curr: Constant current setting for a Constant Current Battery Discharge
Test.
Short Test: Enables or disables a Short Battery Discharge Test. A Short Battery
Discharge Test is a short duration battery discharge test used to verify that parallel
batteries are discharging equally. If the discharge current difference between the two
batteries exceeds a preset value, an alarm is generated.
Note: This test requires a system with two battery shunts.
ShortTest Cycle: Short Battery Discharge Test interval.
Short Test Time: Short Battery Discharge Test duration.
Max Diff Curr: An alarm is generated if the maximum difference between discharge
currents of the two batteries exceeds this limit.
BattTestLowCap: If remaining battery capacity is less than this value, a battery discharge
test will not be started.
Temp Comp Menu
Menu Navigation: Main Menu / Settings / Battery / Temp Comp
Note: For WEB Interface; menu items are found under Device Information / Battery Group /
Settings Tab.
"Temp Comp" Parameter Settings:
Temp CompCenter: Sets the temperature at which the system operates at normal voltage
levels.
Temp Comp Coeff: Sets the temperature compensation slope or rate of change per °C
above or below the "Temp Comp" setting. This value is expressed in millivolt per °C per
string (mV/°C/str). For example, for a rate of change of 72 mV/°C/str in a 24-cell 48V
nominal battery string, the rate of change is 3 mV per cell.
TempComp Sensor: Select "None" for no temperature compensation, or the temperature
probe (SMTemp8 T8 / ... / SMTemp8 T1 / ... / SMTemp1 T8 / ... / SMTemp1 T1 / EIB T2 /
EIB T1 / IB2 T2 / IB2 T1) sensing battery temperature for temperature compensation. You
can also select Maximum or Average which takes the maximum or average reading of the
temperature probes (any of SMTemp8 T8 / ... / SMTemp8 T1 / ... / SMTemp1 T8 / ... /
SMTemp1 T1 / EIB T2 / EIB T1 / IB2 T2 / IB2 T1) set as battery temperature probes. When
used with an SM-BRC, you can select to average the SM-BRC temperature probe
readings.
Note: The temperature compensation sensor is also the sensor which displays the battery
temperature on the Web Interface’s Homepage.
Comp Temp High2: Allows you to set a high compensation temperature alarm 2 point.
Comp Temp High1: Allows you to set a high compensation temperature alarm 1 point.
Comp Temp Low: Allows you to set a low compensation temperature alarm point.