Magnum Energy MMS1012 Owner's Manual

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Magnum Energy MMS1012 Owner's Manual Manual pdf 37 page image

© 2010 Magnum Energy, Inc.3.0 Operation31Battery Temperature Sensor Operation - The plug-in Battery Tem-perature Sensor (BTS) is used to determine the battery temperaturearound the batteries. This information allows the multi-stage batterycharger to automatically adjust the battery charge voltages for opti-mum charging performance and longer battery life.When the BTS is installed, if the temperature around the BTS is below77°F (25°C) the absorb and float charge voltage increases. If thetemperature around the BTS is higher than 77°F (25°C), the absorband float charge voltage decreases. See Figure 15 to determine howmuch the charge voltage changes (increases or decreases) as thetemperature reading of the BTS changes. For example, the nominalabsorb charge voltage for a flooded battery at 77°F (25°C) is 14.6VDC. If the battery temperature is 95°F (35°C), the absorb chargevoltage would decrease to 14.3 VDC (14.6 VDC - 0.3 change).If the temperature sensor is NOT installed, the charge voltages willnot be compensated and the battery will maintain the charge it hadat a temperature of 77°F (25°C). The life of the batteries may bereduced if they are subjected to large temperature changes whenthe BTS is not installed.Info: When the BTS is connected, the battery chargeruses a value of -5mV/°C/Cell from 0-50°C to change thecharge voltage based on temperature.-0.75-0.6-0.45-0.3-0.1500.150.30.450.60.750 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0Tem perature reading from BTST em p eratu re C o m p en satio n u sin g B T S0C32F5C41F10C50F45C113F30C86F40C104F35C95F25C77F20C68F15C59F50C122FCha ng e to ba ttery ch arg ing vo ltag eno B T Sc onnec ted1 2 V D C u n its+0.75 V+0.6 V+0.45 V+0.3 V+0.15 VN o C hange-0. 15V-0 .3V-0. 45V-0 .6V-0. 75VFigure 16, BTS Temperature to Charge Voltage Change