ETS-Lindgren HI-4422 Field Probe (Archived) - Manual (Page 87)

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%.
D ISCHARGING A B ATTERY
To discharge the batteries:
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.
Series H-491198-01 Battery Charger for NiMH Batteries | 87
Archived 6/29/10
Use only the content for
HI-4422 in this manual.
Disregard content for
all other probe models;
see ETS-Lindgren
website for other
probe content.