AKG Acoustics manual Intelligent WAY to Power WMS 4000 Transmitters, Such as a PSU

AKG WMS CU 4000

AKG WMS 4000 CHARGING SYSTEM

THE INTELLIGENT WAY TO POWER WMS 4000 TRANSMITTERS

The CU 4000 Charging Unit revolutionizes bat- tery management for wireless systems. The heart of the charging system is the BP 4000 Battery Pack with built-in active monitoring. An integrated microprocessor continuously moni- tors battery status and accurately calculates the remaining battery life. In conjunction with a WMS 4000 wireless transmitter, these data are not only indicated on the transmitter dis- play but are also transmitted to the receiver via pilot tone. The transmitter’s remaining battery life can thus be read out on the receiver within a few minutes’ accuracy, putting an end to the nightmare of batteries failing in the middle of a performance.

A processor-controlled pulse charging system charges the battery pack quickly yet gently, while the integrated “Charge Balance Management” feature makes sure that only as much energy is fed to the battery pack as had previously been drawn from it. In addition, several monitoring circuits and a temperature sensor prevent the battery pack from being overcharged.

A self-discharge counter does not only measure battery discharge during operation but also determines the amount of discharge after pro- longed storage periods. As charging begins, the BP 4000 circuitry communicates with the

CU 4000 charging unit in order to “tailor” the charging process optimally to the status of the battery pack. To eliminate memory effect, the CU 4000 automatically checks whether the batteries need a recovery cycle, and automati- cally starts the cycle upon confirmation by the user. The charging unit provides two charging compartments that allow you to charge two transmitters (HT 4000, PT 4000) or two bat- tery packs at the same time.

The combined BP 4000 plus CU 4000 system is an investment that will quickly help cut expenses and reduce environmental hazards from used batteries.

CU 4000 Charging unit	Lockable DC jack
	For connecting a local or central power supply unit
	such as a PSU 4000.

Charging status display (LED)

Recovery key and LED

Starts a battery recovery cycle. SBMS detects the battery status and suggests starting a recovery cycle to prolong battery life.

2 universal charging compartments

Each compoartment accepts an HT 4000,

PT 4000, or BP 4000 battery pack.

BATTERY CARE
Rechargeable batteries are known to suffer from the so-called	The Recover LED illuminates to indicate it is time for servicing the
“memory effect”. The capacity of a rechargeable battery will	battery pack. Since a recovery cycle may take 14 hours, the best
decrease over time if it is not fully discharged. If a battery is	time to run it is during the night. In any case you will need to start
discharged only to 50% of its capacity over many charging cycles,	the recovery cycle manually. If you service your battery pack regu-
it will finally "believe" its capacity to be only 50%, so that it can-	larly it will retain its maximum capacity throughout its useful life.
not be charged fully any more. To eliminate memory effect, we
recommend completely discharging and recharging the battery
pack periodically (recovery cycle). SBMS permanently monitors
battery parameters and detects the need for a recovery cycle.

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