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The backup time varies depending on the capacity of connected devices.
After calculating the total capacity of connected devices, refer to the graph of the backup time to obtain
an estimation of the initial value of the backup time. (This is also applied to checking the battery.)
(1) Convert the total capacity (power consumption) of the connected devices to watts (W).
For the indication of connected devices, check your computer and the rear of the display.
The indicator can show values in three different ways: volt-amperes (VA), amperes (A), and watts
(W).
Example 1) 100 VAC, 50/60Hz, 145 W
Example 2) 100 VAC, 50/60Hz, 1.8 A
Example 3) 100 VAC, 50/60Hz, 150 VA
For devices that use the VA or A indication, convert the capacity into W. Multiply the value indi-
cated on devices by the value in the right table for conversion.
(When the power factor is unknown, enter “1”. The power factor usually ranges between 0.6 and 1.)
(2) Add the values converted into W to obtain the total capacity of the connected devices.
Indication
Value
VA
×
power factor = W
A
×
power factor
×
100 = W
(1) BU75RW/BU100RW: Connect the AC input plug to commercial power and charge the battery for 8
hours (24 hours if additional battery unit is connected).
BU200RW/BU300RW: Connect the AC input plug, turn ON the INPUT PROTECTION switch (input
overcurrent protection switch) on the back of the unit, and charge the battery for at least 8 hours (24
hours if an additional battery unit is connected).
(2) Turn ON all devices connected to the power output to be “backed up during a power failure”.
(This includes devices connected to the AC outlet of your computer.)
Operate the connected devices in a way that allows the power supply to be stopped at any time.
●
For Windows Server 2003/Vista/XP/Me/2000/Windows NT/Linux/Mac:
Perform measurement while the hard drive is stopped.
●
For Windows 98/95:
Choose "Shut Down" in Windows and follow the procedure below to shut down your OS.
Choose "Restart in MS-DOS mode" to exit from OS and display the MS-DOS mode screen.
(3) BU75RW/BU100RW: Disconnect the AC input plug and measure the backup time.
BU200RW/BU200RW: Disconnect the AC input plug or turn OFF the INPUT PROTECTION switch
(input overcurrent protection switch), and measure the backup time.
In Battery Mode, measure the time until the unit automatically stops and all displays disappear.
* The backup time you measure for the
fi
rst time after purchase is the "initial value of the backup
time."
5-1
How to measure backup time
Measuring the backup time
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5
5-2
Estimated backup time