ESCO Technologies ETS Lindgren 3301B, User Manual

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Power Circuitry | 23
7.0 Power Circuitry
The Model 3301B is powered by two 6 VDC sealed lead-acid batteries. A battery
charger is supplied with the unit. The battery charging port of the front of the unit
allows for easy recharging of the unit. Two internal fuses protect the unit from
unintentional shorting.
7.1 Voltage-Selectable Battery Charger
7.1.1 Operation
The EMCO brand Voltage-Selectable Battery Charger is solely intended for
charging the sealed lead-acid batteries found in EMCO products. The battery
charger is a means of providing the necessary charge voltage and current from
either a 115 or 230 VAC 50/60 Hz source.
It is necessary to select the proper input voltage prior to connecting the
battery charger to the power mains. The voltage select switch is located
adjacent to the power input receptacle.
To maintain safety requirements, use the CSA certified power cord provided. If it
is necessary to provide other means of attaching the battery charger to the power
mains it is required that a type HD 21 (PVC cord) or type HD22 (rubber cord) with
a nominal cross section of 0.75 mm be used.
The battery charger provides both fast and trickle charge operation. The charger
handles switching from one charge mode to the other automatically. The front
panel indicator marked Fast Charge lights when the battery charger is in the fast
charge mode. When the Power On light is illuminated and the Fast Charge light
is dark, the battery charger is in the trickle charge mode.
When not in use, the antenna should be connected to the battery charger in
trickle charge mode. Charging time is approximately eight hours when batteries
are completely discharged.
The antenna is not designed to operate using the battery charger as a
power source. Batteries should provide power to the amplifier for
approximately 16 hours before recharging is required.
Always remove main power before opening the housing.