Alpha Pro charge regulator – User and Installation Manual
This option limits the charge current in a selected number of revs intervals. This prevents
slipping as a result of the high torque required to provide the charge current. Up to the
lower rev limit, the charge current will not exceed 20%. From the higher rev limit, it allows
a maximum charge current of 100%. Revs in between the limit, result in a proportional
maximum charge current.
Note: All RPMs here are Alternator RPMs.
5.4 TEMPERATURE CONFIGURATION (OPTION)
There are two options in the Alpha Pro temperature settings: "Battery" and "Alternator".
• By selecting "Battery", the Alpha Pro expects the (lead acid) battery temperature sensor to be connected to
its temperature input. The measured temperature will be used to compensate the voltage output of the
alternator. When charging batteries that need temperature compensated charge (like lead acid), this
temperature sensor always has the priority, in order to charge the batteries in a save and efficient way. The
battery temperature sensor (Product code: 41500500) is included in the delivery of the Alpha Pro.
• By selecting "Alternator", two temperature levels can be entered. At the first
temperature level, the alternator will start reducing its output power. At the
second temperature level, the alternator will stop charging. Reducing will
follow a linear line between the two temperature levels. The alternator
temperature sensor (Product code: 41500400) is optional. It can be used to
measure the housing temperature of an alternator.
For non-Mastervolt alternators, consult the manufacturer to discuss the
correct temperature values to reduce and stop the charge, considering a
difference in temperature between the temperatures given by the
manufacturer and the spot where the sensor will be installed.
Note: The Alpha Pro has one temperature input. If both temperatures need to be measured, a MasterShunt (Product
code: 77020100) could be added to the system. The MasterShunt temperature sensor input can be used to
measure the batteries and this data can be used by the Alpha Pro, see sections 6.3.1, 6.3.4 and 6.3.8.
CAUTION!
Please note that this solution will not protect the alternator against damage due to overheating.
Mastervolt cannot be held responsible for any damage to a third-party alternator!
The only accurate measurement is on the internal windings and this can in no way be covered by this
sensor. Therefore, this measurement is only an indication!
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