ETS-Lindgren HI-6153 Electric Field Probe - Manual (Page 85)

Series H-491198-01 Battery Charger for NiMH Batteries | 85
Appendix B: Series H-491198-01 Battery Charger
for NiMH Batteries
The HI-6053 Field Probe contains four AAA Nickel-Metal Hydride
(NiMH) batteries, and uses the Series H-491198-01 Battery Charger.
S AFETY P RECAUTIONS
Before operating the Series H-491198-01 Battery
Charger, see General Safety Considerations on
page ix.
I NTRODUCTION
The H-491198-01 Nickel-Metal
Hydride (NiMH) Battery Charger is
a dual power source battery charger.
It charges 4.8 volt 220 mA NiMH
batteries and is powered by
85-264 VAC line power or
12.5 VDC. The H-491198-01 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.