UPS: OFFICE 400 - 2000
Maintenance and
Service
OFFICE Series
38
12.
Maintenance and service
You can expect a long service life and interference-free operation from this
product. The service life and reliability of the UPS is greatly dependent on the
conditions of its environment. The ambient temperature and humidity in the vi-
cinity of the device must remain within the specified range. In addition, the area
around the UPS should preferably be kept clean and free of dust.
At an ideal ambient temperature of approximately 20-15°C, the service life of an
accumulator is typically about 4 years. Through the use of special accumulators,
the service life can be significantly increased (up to 8 years).
It should be regularly checked (6-12 months) if the remaining autonomy time
(back-up time) is sufficient for the intended purposes. Should this no longer be
the case, the accumulators will have to be replaced.
.
12.1
Measuring the support time (autonomous time)
Before beginning with this procedure, it is obligatory that all open data files must
be secured. Also, inform all concerned employees of your intentions.
There are essentially two methods to measure the support time.
Method
A
is suitable for measuring the actual back-up duration whereby the
loads are required to be currentless at the end of the autonomy time. For this
purpose, force the UPS into the autonomous mode and measure the time until it
automatically shuts down.
Method B
allows for the determination of the remaining capacity after a defined
back-up period. Also for this method, first force the UPS into the autonomous
mode for a specific duration. In returning to the mains operation mode, note the
remaining capacity. Then calculate the autonomy duration through an estimation
(linear).
Please remember that after measuring the autonomous period, the accumulator
may be discharged. This means that the UPS device must remain in standard
mode for several hours (min. 6 h) to recharge the accumulator bank accordingly,
before this is again up to 70 % operational (capable of supporting).