ETS-Lindgren HI-6006, User Manual, Page: 47 / 92

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Note : For NiMH
Batteries:
The HI-6023 and HI-
6006 probes contain a
Nickel-Metal Hydride
(NiMH) battery, and use
the Series H-491198-48
Battery Charger.
Before operating
the Series H-491198-
48 Battery Charger,
see Laser Safety
Considerations.
APPENDIX B: SERIES H-491198-48 BATTERY
CHARGER
Introduction
The H-491198-48 Nickel-Metal
Hydride (NiMH) Battery Charger is a
dual power source battery charger. It
charges 4.8 volt 25 mA NiMH batteries
and is powered by 85-264 VAC line
power or 12.5 VDC. The H-491198-
48 Battery Charger uses a -(dV)/
(dT) negative delta V technique to
determine when the battery is fully
charged, which is typically two hours.
With this technique, the charge state
of the battery has no effect other than
shortening the charge time.
Housed in a rugged enclosure, power enters the battery charger through
a power entry module, which contains the fuses, or an optional cigarette
lighter plug adapter. The front face of the battery charger displays LEDs that
provide the operating status. The battery charger connects to the device being
charged through a short cord terminated with a power jack.
An integrated circuit within the battery charger monitors the battery
voltage and controls the charging functions according to the charge state of
the battery.
Battery Life
The NiMH battery powering the battery-operated probe has high energy
density for maximum operating time between charges, but also has a
significant self-discharge characteristic. When the probe is stored for longer
than a week or two, the battery will discharge even though not in use. Leaving
the battery in a discharged condition for long periods of time may result in
reduced battery life. For optimum testing time, charge the battery before use.
The battery charger is microprocessor controlled to charge the battery in
the fastest possible manner. When the charger senses that the battery is
fully charged, the charging current drops to a maintenance level. This level
is sufficient to maintain the battery fully charged without causing battery
damage. It is acceptable to leave the probe connected to the battery charger
for extended periods of time.
With proper care, the battery should last two to three years. Follow these
recommendations to ensure maximum battery life and optimum
testing performance: