4 Maintenance and inspection
4-3 Measuring the backup time
BU5002R/BU3002R/BU3002RH
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■ Battery inspection (measurement of backup time) guidelines and frequency
Ambient temperature
Every 6-months check
Monthly check
40°C
For 1 year after purchase
1 year or more after
commencement of use
30°C
For 3 years after purchase
3 years or more after
commencement of use
25°C
For 4 years after purchase
4 years or more after
commencement of use
* The battery deteriorates even if it is stored. The higher the temperature is, the shorter the
life becomes.
4-3 Measuring the backup time
4-3-1 How to measure backup time
The backup time you measure for the first time after purchase is the “initial value of the
backup time”. Thereafter when battery inspection is performed, the battery degradation
st
atus can be more accurately judged when the “initial value of backup time” has been
measured.
(1) Connect to commercial power and charge the battery for 8 hours or more.
(2) Turn ON all devices connected to the unit.
(3) Turn off the commercial power and measure the backup time.
In Battery Mode, measure the time until the unit automatically stops and all displays
disappear.
Every time an expansion battery unit is connected, the charging time is increased by
16 hours for each unit.
The power supply output of the unit will stop when the battery discharges.
Conduct measurement under a condition in which no problem occurs even if the
power supply of the connected device stops during the process. Do not conduct
measurement if there is a possibility of a failure when the power supply stops.
