60
7. Measuring the backup time (checking the discharge time of the battery)
7. Measuring the backup time
(Checking the discharge time of the battery)
7-1 Measuring method of the backup time
(1) Connect the AC Input Plug of the UPS to a wall outlet (commercial power) and charge it for approximately
12 hours.
If you operate the UPS for 12 hours or more, it is charged. If a power failure occurred during this period,
charge it again.
(2) Turn ON all devices connected to the power output to be “backed up during a power failure”.
(Including devices connected to the AC outlet of your computer.)
Operate them in a way in which it is allowable that power supply to the connected devices stops.
●
For Windows Server 2003/XP/Me/2000/Windows NT/Linux/Mac:
To be performed in case of hard drive stops.
●
For Windows 98/95:
Choose Shut Down of 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 disconnected.
* The backup time you measure for the first time after purchase is the "initial value of the backup time."
7-2 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) Unify the total capacity (power consumption) of connected devices to W (Watt).
For the indication of connected devices, check your computer and the rear of the display.
There are 3 types of indication: VA (Volt·Ampare) indication, A (Ampare) indication, and W indication.
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.
Indication
Value
VA
×
power factor = W
A
×
power factor
×
100 = W
