Sensata Dimensions 12LP15 Owner's Manual page 20

External Power Mode (LPC Only) Continued
Charger Battery Temperature Sensor (BTS)
The BTS measures the battery temperature and automatically adjusts the charger output voltage for the fastest and
safest charge.
NOTE: If the BTS cable is not connected, the battery charger will not function. The charger will output
about 8 VDC if the battery voltage has been removed after the charger starts.
When batteries are cold, their chemical reaction is slowed so they will not charge as easily. A charge voltage
optimized for room temperature will not charge the battery at low temperatures. The BTS cable allows the charger
to increase the charge voltage for optimum charging at low temperatures.
When batteries are hot, their chemical reaction is accelerated and they absorb energy too quickly. A charge voltage
optimized for room temperature will tend to overcharge the batteries and cause gassing. The BTS will cause the
charger to decrease the charge voltage to a safe level.
The charger will switch to a "warm battery" mode in which the charger will only provide a float voltage when the
batteries reaches 122°F/50°C to 140°F/60°C. If the battery temperature continues to rise over 140°F/60°C, the
charger will shut off. The charger will resume charging in the "warm battery" mode when the battery cools to
131°F/55°C. The charger will resume normal charging when the battery cools to 113°F/45°C.
Install the Battery Temperature Sensor
1. Connect the lug end of the temperature compensation cable to the negative post of the battery.
2. Insert the sensor plug to the appropriate mating connector located at the side of the inverter labeled "Temp
Sense." BTS cable is part# ME-BTS-XX (XX=length in feet - 6, 8, 15, 25, 40).
Figure 10 BTS
Page 20
12LPC15 Manual