c) Draw discharge curve according to the notes, and keep record for
comparing with future test.
Marks
(1)Off-system test method is not recommended for UPS system battery group.
(2)When operating the on-system test method and check-aimed capacity test, if
the tested UPS equipment equipped with discharge performance itself, the test
performance of discharging should be opened. If it is without discharge test
performance, its Ac input should be cut off before process the discharge test.
Notes
1)The above mentioned capacity test are the most frequently used in daily
maintenance, but whatever method is used, it is very important to keep proceeding the
system during the test period. Therefore, before processing the test, we should
investigate whether there is plan to stop electricity and the standby generator should
be ready to work at any time.
2)Apply multimeter, inner-resistant instrument, conductance instrument to make a
defend test before the capacity discharge test.
3)In order to make sure that accuracy of the capacity test, professional on-system
test instrument and fake load should be adopted.