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5 Maintenance and inspection
S8BA-series Uninterruptible Power Supply (UPS) User’s Manual (U726)
5
5
-2-1
Notif
icatio
n that the ba
ttery unit needs to be r
eplaced
The function that counts the battery unit energization time and notifies the user when it is time to
replace the battery unit is called the battery life counter function.
The UPS measures the ambient temperature at every 8 hours and adds the counter value according to
the measured temperature. Here, the initial value of the lifespan counter before adding the counter
value, which is measured at every 8 hours, is set to 0.
The lifespan of the lithium battery tends to be affected by the charging time and the ambient tempera-
ture; thus the temperature coefficient is set to "1.0" for 25 degrees Celsius or lower, while it is set to
higher as the temperature rises above 25 degrees Celsius.
When the counter value reaches the specified value (equivalent to 50% of the battery capacity initial
value), notification is performed by the LED.
Calculation formula: t = 109,575/10
α
*8
t: Battery life (hour)
109,575: Counter value showing the battery deterioration (equivalent to 50% of the battery capacity of
the initial value)
α
: Temperature coefficient
Battery Life Counter Function
Average ambient
temperature
Battery life expec-
tancy (t)
Temperature
coefficient (
α
)
55°C
1.9 years
5.3
50°C
2.5 years
4.0
45°C
3.7 years
2.7
40°C
5 years
2.0
35°C
6.7 years
1.5
30°C
8.4 years
1.2
25°C
10 years
1.0
Guidelines for how often to check the battery unit
Average ambient
temperature
6-month check
3-month check
55°C
For the first 1 years after starting use
When 1 years or more have passed after starting use
50°C
For the first 1.5 years after starting use
When 1.5 years or more have passed after starting use
45°C
For the first 3 years after starting use
When 3 years or more have passed after starting use
25°C
For the first 6 years after starting use
When 6 years or more have passed after starting use
100% →
50% →
Default
Guide of battery
deterioration
(Notice by
display on
LED and buzzer )
Battery capacity
Summary of Contents for S8BA-24D24D480SBF
Page 5: ...Manual Structure 4 S8BA Series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 21: ...Revision History 20 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 27: ...1 Overview of the product 1 6 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 55: ...4 Operations 4 10 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...