Alpha Technologies Cordex Controller Ver.3.1x - Manual (Page 28)

0700015-J0 Rev B 26
4.9 Float (FL) Mode
FL is the CXC default mode at start up and during normal system operation. In this mode, the rectifier’s
charge (or output) voltage is driven by the float voltage setting found in the CXC Rectifiers menu, see
6.3.2. Do not adjust the float voltage of the rectifiers when they are in Current Limit.
4.10 Equalize (EQ) Mode
Use the equalize mode to equalize charge a battery string. In this mode, the rectifier’s charge (or output)
voltage is driven by the equalize voltage setting found in the CXC Rectifiers menu, see 6.3.2
A maximum time limit for equalize charging can be programmed to prevent accidental over-charge of a
battery string. This limit is determined by the setting found in the EQ Timeout menu, see 6.3.2.10. Do not
adjust the equalize level of the rectifiers while they are in Current Limit.
When operating in EQ mode, the text below the Mode Selection buttons (Figure 18) displays the time
until FL mode in hours.
4.11 Boost (BST) Mode
This feature provides the supervisor with the means to equalize charge the battery at a higher voltage
relative to the connected load. Activation is manual and certain conditions must be met to prevent dam-
age to the load. A custom alarm must be created to include all the desired factors that must be taken into
account before activating BST mode. This mode will then only be permitted if the alarm is false.
Once activated, BST mode concludes with a timeout or whenever the status of the custom alarm is true
and reverts to FL mode. BST mode can also be cancelled if the conditions required to activate BST mode
have changed.
4.12 Battery Discharge Test or Battery Test (BT) Mode
The battery discharge test is used to update the status of the lead acid battery capacity.
Manual Activation Manually initiated (tap Mode Selection area and then
BT button)
(Figure 18)
Auto-BT Feature BT can be set to run automatically on a periodic basis.
The Supervisor can enable or disable the feature in
(BATTERIES) BATTERY TEST\AUTO-BT menu. See
section 6.5.4.
4.12.1 Definitions
• End/Terminal Voltage — The voltage at which the test ends.
• Timeout — The maximum time the test can run before it is aborted.
• Period in Days — The time between each Auto-BT.
• Battery On Discharge (BOD) Alarm — indicates the battery is discharging.
4.12.2 Tips on Using the BT Mode
Use Charge Current Control (6.5.2) 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 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 are accessible through the Analog Signals display or Mode Status
screen. The runtime hours reflect the time remaining in the test.
The runtime is 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.