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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 ob-
tain 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.)
Indica-
tion
Value
VA
×
power factor = W
A
×
power factor
×
100 = W
(1) When the AC input plug is connected to a wall outlet (commercial power), the battery automati-
cally starts charging, taking up to 12 hours to complete.
(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.
(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 dis-
connected.
* The backup time you measure for the fi rst time after purchase is the "initial value of the back-
up time."
5-1
How to measure backup time
Measuring the backup time
55
5-2
Estimated backup time
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