Accumulator and Battery Operation

Accumulator operation

The accumulator of the MSK 33 is not charged in delivery status and must be charged before initial operation. To do so, connect the unit with the mains, and switch on the power supply with the mains switch on the front panel of the unit. When the green LED on the front panel lights up, the accumulator is charged. The charging time of an empty accumulator is about 6-7 hours.

After a complete discharge or during longer pauses of operation, the accumulator must be recharged as soon as possible, otherwise the accumulator may be dam- ages or even destroyed.

The charging procedure automatically starts after the unit has been connected to the mains and switched on. Overload of the accumulator is not possible.

An internal over-discharging guard circuit automatically switches off the unit at a capacity of 0%.

The maximal operating time with a charged accumulator is ca. 80 minutes (without LNB voltage supply). For the LNB supply of 200 mA, the accumulator operating time is about 1 hour.

The unit should be connected to the mains during longer pauses of operation (con- servation of the battery).

Improper handling of the accumulator can damage the unit and result in total breakdown.

The loading status of the built-in lead accumulator can be determined in the main menu. The following displays are available:

Operating mode	Loading status charging-discharging current
Mains	CHARGING : 53% I = 0.76 A
Battery	ACCU CAP. : 90% I = -1.30 A

DC socket (option)

The DC socket (XLR socket) is located on the rear panel of the MSK 33. The unit can be operated via this socket with a DC source of 11...14V (auto battery or power supply unit). The charging of the internal unit accumulator is also possible via this socket.

Here, disconnect the LNB voltage supply.

The operation of the MSK 33 guaranteed but not the charging of the internal accumulator.

Only use the supplied cables with the original connectors.

If the external DC voltage decreases below 11 V, the MSK 33 automatically stops the loading process of the internal battery and operation via the exter- nal power supply. As soon as the fed –in voltage reaches 13.5 V, the MSK 33 switches over again to external DC operation and charging of the internal ac- cumulator. This function is indicated by the green LED on the rear panel of the unit.