La Marche A77, Инструкция по установке и эксплуатации

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1.6 Temperature Compensation (Option 11W/11Y)
The natural voltage of a battery changes as a function of temperature change. As the battery temperature
rises, the effective voltage of the battery decreases. Without Temperature Compensation, the battery charger
will always produce a set constant output voltage. As the battery temperature increases, this constant voltage
will then induce a higher output current from the charger. This higher current can result in overcharging the
battery, which in turn can result in damage to the batteries.
Temperature Compensation combats this overcharging by adjusting the charger’s output voltage based on the
temperature read by the temperature probe. An internal temperature sensor is standard, but in order to
increase the accuracy of the temperature compensation an external probe can be used to measure the
temperature of the battery.
Temperature Compensation is off by default, but is adjustable between 0.001-0.005 Volts/Cell/°C in the
customer calibration. The temperature compensation considers 25°C as the nominal ambient temperature and
adjusts the voltage level based on the difference between the actual temperature and 25°C.
With temperature compensation set to 0.003 V/C/°C, a 60L battery measured at 40°C would be charged at a
voltage 2.7V lower than the nominal voltage.
Option 11W includes a 24 foot long temperature probe. Option 11Y includes a 100 foot long temperature
probe. With either option approximately two feet of the probe is taken inside the charger enclosure.
1.6.1 External Probe Connection Procedure
Before making any connections to the A77 ensure that the AC Power is off at the main breaker box and that
both of the charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and
output terminals.
The standard internal temperature sensor has an inline connector. Disconnect the internal temperature sensor
at J4 Header on the main control board. Connect the external temperature probe to the J4 Header on the main
control board; the connection can only be made one way to avoid polarity issues.
Figure 9 - Temperature Compensation Connection Diagram