Omron BN100T, Instruction Manual, Page: 57 / 110

4 Maintenance and Inspection
4-1 Checking the battery
BN50T/BN75T/BN100T/BN150T/BN220T/BN300T
4-2
4-1-3 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 dis-
play. The indicator can show values in three different ways: volt-amperes (VA), am-
peres (A), and watts (W).
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 de-
vices from the graph below.
 Graph of backup time (graph of initial values for products that have not been used at
25°C).
The backup time becomes shorter than the graph (table) below when temperature is
lower.
 The smaller the capacity of connected devices becomes, the longer the backup time
becomes.
Backup time (25°C, Initial Value)
Capacity (W)
BN50T
BN100T
BN75T
BN150T
BN220T
BN300T
BN50T(450W) BN100T(900W) BN220T(1980W)
0
20
40
60
80
100
120
140
160
B
ac
ku
p t
im
e (
M
inu
te
s)
0 500
2500 3000
2000 1500
1000
Example 1) 100 VAC, 50/60Hz, 145 W
Indication Value
Example 2) 100 VAC, 50/60Hz, 1.8 A A A × power factor × 100 = W
Example 3) 100 VAC, 50/60Hz, 150 VA VA VA × power factor × 100 = W
4 Maintenance and Inspection
4-1 Checking the battery
BN50T/BN75T/BN100T/BN150T/BN220T/BN300T
4
4-3
Backup time table
Time unit: (Minutes)
BN50T
Connection
capacity (W)
20 50 100 200 300 400 450
Backup time
(Minutes)
250 110 55 24 15.5 10.5 8.5
BN75T
Connection
capacity (W)
20 50 100 200 300 400 600 680
Backup time
(Minutes)
250 110 55 24 15.5 10.5 5.8 4
BN100T
Connection
capacity (W)
20 50 100 200 300 400 600 800 900
Backup time
(Minutes)
480 215 120 56 35 25 16 11 9
BN150T
Connection
capacity (W)
20 50 100 200 300 400 600 800 1000 1200 1350
Backup time
(Minutes)
480 215 120 56 35 25 16 11 8 6.2 4.5
BN220T
Connection
capacity (W)
20 50 100 200 300 400 600 800 1000 1200 1400 1600 1800 1980
Backup time
(Minutes)
900 460 250 125 81.5 57 36 25 18 14 11 9.5 8 7
BN300T
Connection
capacity (W)
20 50 100 200 300 400 600 800 1000 1200 1400 1600 1800 2000 2300 2700
Backup time
(Minutes)
900 460 250 125 81.5 57 36 25 18 14 11 9.5 8 7 5.8 4.5
Note: These backup times are for reference only. Times may vary according to battery life and external
environmental conditions (temperature, etc.).