Temperature Parameters

P12

7521 AND 7522 BATTERY CHARGERS

WARNING

Altering the default temperature parameters could cause serious property or personal damage. Contact your battery manufacturer to clarify the correct temperature parameters for your specific batteries.

NOTE: Temperature parameters refer to the temperature measured at the temperature sensor, not the temperature of the charger. In this manual all temperatures will be referenced in degrees in Celsius (°C). The user selectable range for battery temperature parameters is -20°C to 60°C. Ensure proper placement of battery temperature sensor by referencing Step 8 on page 10

Minimum Charge Temperature: The default is 0ºC

The lowest temperature of the sensor in which the charger will continue charging. If the temperature sensor falls below the minimum charge temperature, the charger will enter standby mode, and cease to charge.

CAUTION

Charging batteries below 0°C can be potentially dangerous. Internal battery liquid can freeze and charging a frozen battery could cause serious property or personal damage. Contact your battery manufacturer for minimum safe charging temperature for your batteries before altering.

Maximum Charge Temperature: The default is 50ºC

The highest temperature of the sensor in which the charger will continue charging. If the temperature sensor increases above the maximum charge temperature, the charger will enter standby mode, and cease to charge.

CAUTION

Charging batteries above 50°C can be potentially dangerous. Contact your battery manufacturer for the maximum safe charging temperature for your batteries before altering.

Battery Temperature Compensation (Tempco)

Battery temperature compensation is output voltage regulation based on battery temperature variances. Since batteries can see extreme temperature differences it is important to regulate output voltage with temperature. A battery in a freezing environment should not be charged the same as a battery in a hot environment. The P12 Battery Charger

is set at a baseline of 25°C. Every degree variance from this baseline will result in a voltage variance on all outputs. For every degree above 25°C the charger will reduce all output voltages by the value defined in Battery Tempco. For every degree below 25°C the charger will increase all output voltages by the value defined in Battery Tempco. For example, with the default Battery Tempco set to -30mv/°C if the temperature sensor reads 26°C, then all output voltages will be reduced by .03V (30mv). If given the same Battery Tempco and the temperature sensor reads 24°C, then all output voltages will be increased by .03V (30mv).

CAUTION

Altering the battery temperature compensation value incorrectly can cause adverse effects on your battery, by potentially reducing its life. Contact your battery manufacturer to find out the specific temperature compensation parameters for your batteries.

Specifications are subject to change. See bluesea.com/P12 for current information.

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Blue Sea Systems P12 user manual Temperature Parameters, Minimum Charge Temperature The default is 0ºC