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POWERING TECHNOLOGY
Manual No. MS0027-MAN rev. 4
guardian_access_3u_ms27-man-rev4-0817.indd
Boost charging gures
Observe and write down all of the boost charging gures. Parameters to be read/set/adjusted
from control unit or PC with PowCom™ installed.
5.6 Battery supervision
For systems with symmetry cables supplied:
Set the number of battery strings according to the number of battery strings in the system.
The settings are to be made in the control unit via a PC with PowCom™ installed or directly
in the controller (if symmetry failure is indicated).
The symmetry fault alarm can be simulated by pulling out one symmetry cable from the
battery string. Measure that setting to make sure that it is in accordance with the battery
manufacturer’s recommendations.
For systems with temp. probe cable supplied:
Temperature compensation is factory pre-set. Check that the temp. probe is activated and verify
that the compensation level is in accordance with the battery manufacturer’s requirements. (If
no compensation level is available from the battery manufacture, UNIPOWER recommends
that it is set to 0.5V).
5.7 Battery test
Settings should be made according to the battery manufacturer’s requirements, but as a rule
of thumb the following settings can be used for standard VR lead batteries:
No. of test pr. year = 2
U3 Test = 1,9 V/cell
End voltage b.test = 1,94V/cell
Batt. test time = 40% of expected backup time
Ah limit for test = 40% of nominal battery capacity
Parameters should be set/adjusted from the controller (Battery test menu) or “Supervision -
Set parameters” menu in PowCom™.
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