Alpha Technologies PowerAgent SC3 - Manual (Page 35)

PowerAgent TM SC3 Site Controller Document # 700-000014-01 Rev 2
Installation and Operation
Phoenix Broadband Technologies, LLC 10/28/2010
Page 35 of 57
The String Current field in the lower right hand corner displays the string charge or discharge
current in amperes. This field is for use with a current sensor that is in development.
Pressing the Previous String or Next String buttons will move to the previous or next string on
this Site Controller. Pressing the Return to Overview Display button brings up the Overview
Display.
6.3 Single Jar Display
This web page displays the measurements and control for a single Jar. Alarming parameters are
color coded with red for major alarms and yellow for minor alarms.
A user definable Jar (or Cell) Name is displayed for each jar. Some operators use this field to
identify the manufacturer and model number of the jar, or the installation date. The name may be
modified by pressing the associated S button.
The Jar (or Cell) Voltage measured by the battery sensor is displayed. Measurements are
made and report each time the sensor is polled. Alarms may be provisioned for this current by
pressing the associated A button.
The Jar (or Cell) Temperature measured by the battery sensor is displayed. Measurements are
made and report each time the sensor is polled. Alarms may be provisioned for this current by
pressing the associated A button.
For multi-cell jars the Jar Admittance and Cell Admittance are displayed. For single cell jars
only the Cell Admittance is displayed. Battery sensors actually measure the Jar admittance,
which for single cell jars is the same as the cell admittance. The multi-cell Cell Admittance is
calculated from the Jar Admittance. Measurements are made at intervals specified in the Site
Setup Display. The time of the most recent measurement is also displayed.
Perhaps the most useful parameter is the Cell Admittance Change. This is the difference
between the present Cell Admittance and the user specified Initial Cell Admittance expressed
as a percentage. The cell admittance change provides an indication of how the jar has changed
over time. The date and time of the admittance measurement and the initial admittance setting
add a time perspective to the change. Alarms may be provisioned for the change by pressing the
associated A button.