Alpha Technologies Cordex Controller Ver.2.0 - Manual (Page 20)

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Alpha Technologies Ltd. 034-136-C0 Rev B WC
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4.3.4 Battery Discharge Test or Battery Test (BT) Mode
The battery discharge test is used to update the status of the lead acid battery capacity. BT can be set to run
automatically or can be initiated manually (via Mode Selection button).
4.3.4.1 Definitions
End/Terminal Voltage — The voltage at which the test will end or terminate.
Timeout — The maximum time the test will be permitted to run before it is aborted.
Period in Days — The time between each Auto-BT.
Battery On Discharge (BOD) Alarm — This alarm will indicate that the battery is discharging.
4.3.4.2 Manual Activation
The user can manually activate the test by tapping the BT mode selection button (Figure 7).
4.3.4.3 Auto-BT Feature
This feature will enable the CXC to start a test automatically on a periodic basis. The Supervisor
may enable or disable the feature in (BATTERIES) BATTERY TEST\AUTO-BT menu, see
6.4.5.2.
4.3.4.4 Tips on Using the BT Mode
Use Charge Current Control (6.4.3) to limit the battery recharge current to the battery
manufacturer’s specified maximum value.
The resultant battery capacity estimate will be more accurate if the test is started when the
battery is fully charged. If a recent discharge has occurred within the last 96 hours, when a
mode change to BT is selected, a dialog box will prompt the user to confirm the mode change.
During a test, the runtime hours will be accessible through the Analog Signals display or Mode
Status screen. The runtime hours will reflect the time remaining in the test.
The runtime will be displayed after the start of an outage and when a BOD condition is detected;
i.e., battery is sourcing current and voltage is below open circuit.
When a test is started by the remote BT feature, the battery log will show “Remote BT” in the
Event Type column.
The BT depth of discharge (DOD) can be accessed via the Analog Signals Display; provides an
additional indication of test progress.
BT information is available via the CXC’s battery log web page when a test is in progress. In
addition, the new battery capacity estimate can be accessed via the Analog Signals display at
any time before, during or after the test.