Measuring The Backup Time; How To Measure Backup Time; Estimated Backup Time - Omron Powli BU50SW Instruction Manual

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Measuring the backup time

5-1

How to measure backup time

(1) When the AC input plug is connected to a wall outlet (commercial power), the battery automatically
starts charging, taking up to 8 hours to complete (24 hours when 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:
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) Disconnect the AC Input Plug of the UPS and measure the backup time.
Measure the time until the unit automatically stops and all displays disappear with the plug disconnect-
ed.
* The backup time you measure for the fi rst time after purchase is the "initial value of the backup time."
5-2

Estimated backup time

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 indicated 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.
(3) Calculate the initial value of the backup time for the total capacity of the connected devices from the
graph below.
● Graph of backup time (graph of initial values for products that have not been used)
● The smaller the capacity of connected devices becomes, the longer the backup time becomes.
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BU SW / BU SW / BU
Indication Value
× power factor = W
VA
× power factor × 100 = W
A
100 150
SW / BU SW
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8
9
1 0
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