4 Checking the battery
4-1 Checking the battery
BL50T/BL75T/BL100T
48
4-1-4 Estimated backup time
The backup time changes depending on the capacities of the connected devices.
After calculating the sum of the capacities of the connected devices, use the backup time
chart as reference for setting the initial value for the backup time (do the same for a
battery check).
1.
Unify all the units of capacity (power consumption) expressed for the connected
devices into Watts.
For an indication provided on a connected device, check the PC's main body and
the back of the display.
There are 3 types of indication: VA (Volt·Ampere) indication, A (Ampere) indication,
and W indication.
Example:
100VAC, 50/60Hz, 145W
100VAC, 50/60Hz, 1.8A
100VAC, 50/60Hz, 150VA
Indication
Value
A
W=A x 100 x power factor
VA
W = VA x power factor
For a device with indication in VA or A, convert VA or A into W. For conversion,
multiply the value indicated for the device by one of the values in the above table.
If you do not know the power factor, set it as "1". Normally, the power factor is a
value in the range 0.6 to 1.
2.
Calculate the sum of the values converted into W to obtain the sum of the
capacities of the connected devices.
3.
Using the chart below, calculate the initial value for the backup time according to
the sum of the capacities of the connected devices.
※
If the temperature is low, the backup times become shorter than the
corresponding values in the chart (table) on the next page.
※
The backup time becomes long when the sum of the capacities of the
connected devices is small.