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DSOP24V
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10.3. The procedure for checking the DSO.
1. Check the indication displayed on the front panel of the power supply unit:
a) On the LED display (see section 5.3) the power supply should indicate a voltage in the range of
22 ÷ 28,8V depending on the battery charge and ambient temperature.
b) The 230V AC LED should remain lit to indicate the presence of the supply voltage.
c) The AUX LED should remain lit to indicate the presence of the output voltage.
2. Check the output voltage after 230/400V AC power failure.
a) Simulate the lack of 230/400V AC mains voltage by disconnecting the main circuit breaker.
b) The 230V AC LED should go out.
c) The AUX LED should remain lit to indicate the presence of the output voltage.
If the indication panel is installed, the yellow indicator will light be lit and the alarm sound will
be activated.
d) The EPS and ALARM technical outputs will change their status into opposite after 10s / 1min /
10min / 30min, depending on the "EPS" parameter set in the power supply configuration menu
(the default setting is 10s).
e) Turn on the 230/400V AC mains voltage again. Indication should return to the initial status
within a few seconds.
3. Check whether the lack of continuity in the battery circuit is properly indicated.
a) Disconnect one of the battery circuits (230/400V AC mains supply) during normal operation of
the power supply unit by disconnecting the fuse.
b) Within 5 minutes the PSU will start signaling a failure in the battery circuit.
c) The ALARM LED will start blinking.
d) The APS and ALARM technical outputs will change status into opposite.
If the indication panel is installed, the yellow indicator will light be lit and the alarm sound will
be activated.
e) Turn on the fuse in the battery circuit again.
f) The power supply should return to normal operation, indicating the initial status, within 5
minutes after the battery test is completed.
g) Repeat the a..f procedures for the second battery string.
10.4. Battery test report.
After installing and running the DSO system it is recommended to measure the battery parameters and
prepare the measurement report. Next measurements should be made at least every 12 months (recommended
every 6 months).
Preparing the measurement report and sending it within two weeks to the company's e-mail address
is one of the conditions for battery warranty claim.
When performing measurements, observe the following rules:
- Measurements must be made with an accuracy of two decimals
- The batteries should be fully charged. It can be assumed that this condition has been achieved if there
has been no interruption in the supply of electricity and no tests of the sound system from the backup power source
have been performed in the last 72 hours.
- The PSU runs a battery test, during which an approximately 3 sec. voltage drop can be observed, every 3
seconds. Make sure that the voltage is stable during the measurement process; if so, the measurement results can
be saved
- The resistance of the battery circuit and the battery temperature can be read on the display of the DSO
Table 20. Battery test report
No.
Measurement
date
Battery voltage [V]
Battery resistance
[Ohm]
Battery
temperature
[ºC]
Performed
by
String no. 1
String no. 2
String
no. 1
String
no. 2
Bat 1
Bat 2
Bat 3
Bat 4
1
2
3