Metrohm Power Box (for 899 Coulometer) - Manual (Page 16)

4.2 Operating modes
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10 ￭￭￭￭￭￭￭￭
Power Box
The Power Box is charged no matter whether the 899 Coulometer is
switched on or switched off.
899 Coulometer with the Power Box without power failure
mode
￭ The power supply unit is connected to the Power Box and to the mains
supply.
￭ The Power Box is switched off.
￭ The 899 Coulometer is connected to the Power Box.
￭ The 899 Coulometer is switched on.
The 899 Coulometer can be operated normally as long as the mains sup-
ply is stable. The Power Box does not take over supplying power if the
mains supply fails. The 899 Coulometer is shut down in a controlled way.
899 Coulometer with the Power Box without power supply
unit
￭ The Power Box is fully charged and switched on.
￭ The Power Box is not connected to the power supply unit and the
mains supply.
￭ The 899 Coulometer is connected to the Power Box.
￭ The 899 Coulometer is switched on.
The 899 Coulometer can be operated for at least 12 h (see Chapter 4.4,
page 12).
Stand-alone operation
￭ The power supply unit is connected to the Power Box and to the mains
supply.
￭ The Power Box is switched on.
The Power Box is charged. Once it is fully charged, the LED switches to a
higher light intensity (1-1).
The intelligence of the Power Box prevents overcharging, even if the
Power Box is connected to the mains supply for more than 14 h.