Alpha Technologies Spectra Series - Manual (Page 32)

Preliminary Operating Instructions 32 of 62 AIP SERVICE NUMBER 1-800-863-3364
supply loss or an open charger AC input breaker will also cause it. AC Power loss, or an open
charger AC breaker is also displayed with the green “AC ON” LED being off.
DCFail
This stands for DC voltage failure. This fault is caused by the DC output circuit breaker being
open (in the OFF position), or the charger detects no DC voltage. This fault will not be displayed
on the display, but it will cause the “DC ON” LED to be off. The optional ALARM I/O Relay Board
LED and contact for this fault will be active if this fault detector is armed along with the summary
alarm and contacts on the SCR Driver Board.
The Hi DC, Lo DC, EOD, GFI +, and GFI - faults can be armed or disarmed in the Alarm Settings
menu and the alarm set points can be set at the point the user wants them to become faults. The
optional ALARM I/O Relay Board LED and contact for these faults will be active if this fault is
armed along with the summary alarm and contacts on the SCR Driver Board. They will be
explained further in the Alarm Settings section.
The Hi AC and Lo AC can be armed or disarmed in the Alarm Settings menu, but the user
cannot change the values. The optional ALARM I/O Relay Board LED and contact for these
faults will be active if this fault is armed along with the summary alarm and contacts on the SCR
Driver Board.
11.3.3 DC SETTINGS
The DC Settings menu has the following menus: Charger type, Float, Eqlz, Amps, Offset, and
Temp Comp. These allow the user to view and make changes to the charger profile. They will
be explained in the following sections.
Charger Type
The first display after you press the RIGHT ARROW button gives you the charger type
information. Example: “12Cells 20A” (Factory set at Cells and DC amps).
BY PRESSING THE UP OR DOWN ARROW BUTTONS YOU CAN VIEW AND CHANGE THE
FOLLOWING:
Float
Sets the float voltage for charging of the batteries. This is factory set at voltage per cell but can be
changed to voltage (of the entire battery set). (Factory set @ 2.25 V/C with a range of 2.0 to 2.5
V/C)
Eqlz (Equalize)
Sets the equalize voltage for charging the batteries during an Equalize cycle. This is factory set at
voltage per cell but can be changed to voltage (of the entire battery set). (Factory set @ 2.32 V/C
with a range of 2.0 to 2.5 V/C)
Amps
Sets the Current limit that the charger delivers to the batteries. (Factory setting same as charge
DC ampere Rating with maximum current range of 110% of this value.)
Offset
Sets the voltage offset or voltage compensation for the cable’s voltage drop due to the cable’s
resistance between the charger and the battery. The cable’s voltage drop can be found two
ways. Voltage offset should only be used when the cable’s drop difference causes problems.
The two methods are listed below:
• Read the display voltage at the rated DC output current then subtract the battery voltage
measured at the batteries. Both of these readings should be done at the rated DC output
current of the charger.
• Find the resistance of the cable and multiply that by the DC output current rating of the
charger.