ESCO Technologies ETS-Lindgren HI-6006, User Manual

Page: 77 / 140

ets-lindgren.com Series H-491198-01 Battery Charger 77
Following the maximum time of 180 minutes, a pulse-trickle charge mode is used
to compensate for the self-discharge of the batteries while idle in the charger.
The fast charge current is low enough that there is not always enough heating of
the battery cells to cause the voltage to drop. With no voltage drop there is no
peak voltage detection, and the fast charge will terminate after the maximum time
of 180 minutes is reached.
S
YNCHRONIZING THE
B
ATTERY
C
HARGE
I
NDICATOR
The probe has internal circuitry to track the charge condition of the batteries.
NiMH batteries have a sharp discharge-curve knee, which means there is little
indication that the batteries are nearly discharged prior to a low battery condition.
The internal circuitry tracks the charging and discharging currents of the batteries
and displays the calculated battery condition.
It is possible that the battery charge indication may lose synchronization with the
actual battery condition. A loss of synchronization may be indicated by a low
battery charge alert after the batteries were recently fully charged. Loss of
synchronization may also be indicated by short battery life and premature low
battery alert.
To synchronize the battery charge indicator:
1. Make sure the probe is off or the batteries will not charge.
2. Connect the battery charger to the electrical mains, and then plug the
charger output into the battery charger connector on the probe.
3. Press the DISCHARGE button on the battery charger. The batteries
will fully discharge, and then fully recharge. The total time required to
discharge and recharge is approximately seven hours.
4. For best results, repeat the process once. However, it may be
necessary to repeat the process three times for proper
synchronization. The synchronization process may take up to 12
hours.
When completely charged, the battery indicator for the probe should indicate a
charge level of more than 90%.