PS Magazine - TB 43-PS-669
PS, The Preventative Maintenance Monthly
ISSUE 669
AUGUST 2008
19
PS 669
AUG 08
Do the weekly PMCS and systems checks.
That makes sure that when lives are
on the line the ITAS is ready to deliver. The lithium battery box (LBB) is the power
source for the ITAS. The LBB needs to be recharged to at least nine battery capacity
(BAT CAP) bars once a week. Charging the LBB can be done either on the vehicle
using the vehicle-mounted charger (VMC) or off the vehicle using the lithium-ion AC
charger (LIAC).
The VMC and LIAC provide a “fast charge” to the LBB up to 90% (nine BAT
CAP bars) within four to Fve hours. The VMC and LIAC will continue to provide
a “balance charge” to balance the LBB cells to 100% (10 BAT CAP bars). When
balance charging, the LBB CHARGE indicator will cycle on and off. This is normal.
Continue to charge the LBB until it’s at nine to ten bars.
If the LBB is not allowed to balance charge, the cells will be out of balance and won’t
fully charge. But an extended charge will take care of that problem. An unbalanced
LBB will seem to stop charging at six to eight bars, but it’s really balancing the internal
cells. Balance charging is very slow. ±or every unlit BAT CAP bar, the LBB may need
to be left on charge for up to three days.
So keep it charged and balanced!
The LBB should be fully charged prior to placing it in storage. Check the LBB
every
three
months while it’s in storage and recharge it to a BAT CAP of nine to ten
bars.
If the LBB displays a constant BAT or ELEC fault indicator or it will not charge
above Fve BAT CAP bars, turn it in to maintenance.
This information will be included in the updated ITAS TM 9-1425-923-10.
Don’t forget truck batteries.
When the ITAS is mounted on a truck, remember
that when you get a BPS INTERNAL message that means the ITAS has switched
over to LBB power to prevent the truck batteries from being drained. The
HMMWV’s radio and other electronic gear, however, continue to draw truck
battery power. So as soon as you safely can, start your HMMWV and recharge
its batteries. This is also a good time to charge the LBB.
The ITAS Has It!
if your unit needs
the ability to detect
and destroy enemy
targets day or night
from near and far,
the Itas (improved
target acquisition
system) can do it.
but to
protect
you, the
Itas needs
protection
by its crew.
for
instance…
hey,
this
Itas has
about drained
my batteries.
I need
recharging!
669.18-19.indd
1-2
7/7/08
6:09:39 PM
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