• Sentry Sm Series Battery Charger Manual

Leave It Alone. Designed for totally automatic, unattended operation.

All you have to do is set the front-panel switch to “automatic”, and the Sentry charger takes over. As the battery approaches full charge, the Sentry’s ferro-resonant transformer gradually tapers back the charging current. Then the charger turns itself completely off until it’s needed again. When it’s off, it’s completely off. Sentry FR-series chargers are available in a wide range of 12V, 24V and 32V models, with output current ranging from 20 to 60 amps.

Standard input power is 115 or 230 VAC power. Models are available for 50/60 Hz operation. A manual/automatic selector switch, ammeter, full charge and power indicator are conveniently located on the front panel. Sentry chargers are designed for totally automatic, unattended operation. All you have to do is set the front-panel switch to “automatic”, and the Sentry charger takes over. It monitors all battery banks. Whenever it senses a drop in voltage level in any of them, the charger comes on instantly, matching its output precisely to the load on your DC system.

As the battery approaches full charge, the Sentry’s ferro-resonant transformer gradually tapers back the charging current. Then the charger turns itself completely off until it’s needed again.

Sentry Sm Series Battery Charger Manual

When it’s off, it’s completely off. There’s absolutely no output trickle to overcharge and dehydrate, damage or warp your batteries’ cell plates. If the charger is on when you start your engines, the Sentry shuts itself off automatically as soon as you turn on the ignition. A manual override function is provided to give you extra help in cranking the engines on weak batteries. Wide Range of Choices. Sentry battery chargers are available in 12 V, 24 V and 32 V models, with output current ranging from 20 to 60 amps. Standard input power is 115 or 23OV, 60 Hz AC power.

Models are also available for 23OV, 50 Hz, and certain models can be ordered for automatic switchover between 50 and 6O Hz power supplies. Standard Sentry units have negative ground with triple output, permitting up to three separate banks of batteries to be charged simultaneously. A fourth output is available as an option on most models. A manual/automatic selector switch and ammeter are conveniently located on the front panel, along with AC input fuses, DC circuit breakers, DC fuses and indicator lights.

An optional remote panel is also available. It may be ordered with the standard unit or added later.

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The Sentry switchmode chargers are designed for unattended operation. When current is requested or the battery needs charging, the Sentry SM charger responds with the required output. The three-step charger brings your battery up to full charge very quickly. When the battery reaches a “float” condition, output is reduced to match that requested by the battery. The unit also acts as a power supply to operate your 12/24 volt systems directly, should the need arise.

T&T: Sentry SM Battery Charger T&T: Sentry SM Battery Charger Philip Odom Tue Sep 27 08:56:51 EDT 2005. Previous message:. Next message:. Messages sorted by: I have a Sentry G160-3NCL (12v 60 amp) charger and I have never noticed what voltage it kicked on but never had a problem. I looked in the Sentry manual I have and it shows a G control calibration on how to set the pull in and drop out voltage setting on page 11. It looks like 'pull in 12.8' and 'drop out at 13.9'. Maybe the model I have it different than yours but I can scan and email the page if you would like.

Phil Odom 41' DF Latitude Adjustment Havelock, NC. Previous message:. Next message:. Messages sorted.