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4.
Temperature Compensation
Ultra Series charger is equipped with an External Temperature Compensation feature. The charger is provided
with the compensation circuit and a 24 foot long temperature probe. The natural voltage of the battery
changes as a function of temperature change. As the Ultracap/ battery temperature rises, the effective voltage
of the Ultracap/battery decreases. Without Temperature Compensation, the Ultra Series charger will always
produce constant output voltage. As the Ultracap/battery temperature increases, this constant voltage will
then induce a higher output current from the charger. This higher current can result in overcharging the
Ultracap/battery, which in turn can result in damage or significantly shorten the life of the Ultracap/battery.
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
.
Temperature Compensation combats this overcharging by adjusting the charger's output voltage based on the
temperature sensed by the temperature probe. In order to increase the accuracy of the temperature
compensation the external probe can be used to measure the temperature of the Ultracap/battery.
Please see the image below for connecting temperature cable.
Temperature Probe
Connect to Negative terminal on Ultracap/Battery
Figure 6 – Temperature Compensation Connection
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