Exide Technologies Section 94.40 - Manual (Page 26)

INSTALLING THE AT30
22
7. Check your work. Be sure that:
•
All connections are secure.
•
The shield is connected to ground
at the charger end only (on the main
circuit board).
•
The cable is connected to TB8 on the circuit board. Other terminal
blocks may look similar.
8. Restart the AT30 using the startup procedure in Section 2.1. During startup,
the AT30 displays LEAD on the front panel, indicating that the temperature
compensation is set up for lead-acid batteries. While this is being displayed,
you can press any front panel key to change the display to read
NICD , to
change the temperature compensation setup for nickel cadmium batteries.
The choice you make is saved internally, and will be used again by the
AT30 the next time it starts.
9. Adjust the output float and equalize voltages to the battery manufacturer's
recommended values, using the AT30 front panel meter, as described in
Section 2.3.2.
NOTE: If the temperature compensation probe, or the wiring
from the probe to the AT30, is damaged and becomes an
open circuit, the AT30 detects the damage and displays
E 08
on the display. The charger then reverts to normal non-
temperature-compensated operation until the probe or wiring
is repaired. Once the probe is repaired, you must restart the
AT30 to activate the probe, as described in Section 2.1.
Using temperature compensation
When an electric storage battery is being charged, the terminal voltage of
the battery changes a small amount whenever the battery temperature
changes. As the battery temperature increases, its terminal voltage
decreases. When a battery is charged by a float type charger with a
constant output voltage, float current increases when the temperature
increases. This results in overcharging the battery, which can result in
damage to the materials, or at least the need for more frequent
maintenance.
When the AT30 is equipped with a temperature compensation probe, it is
able to adjust the output voltage applied to the battery to keep the float
current constant, thereby avoiding overcharging. The probe senses the
ambient temperature at the battery, and adjusts the output float/equalize
voltages to compensate for variations in temperature. If the ambient
temperature increases, the AT30 output voltage decreases.
If you are experiencing any inconsistencies in the AT30 when the
temperature compensation probe is utilized, temporarily disconnect the
probe, and refer to the
Application Note ( JD5003-00
) for further details.