Unitronics electric UM2B, User Manual

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5.- SOFTWARE DESCRIPTION
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5.3.- Test performance
Measurements performed using the UM2B system are
accomplished OFF-LINE (out of service). Consequently, before
beginning the test, THE EQUIPMENT UNDER TEST SHOULD
BE GUARANTEED TO BE FREE FROM VOLTAGE.
Before beginning the test, the UM2B should already be connected to
the PC by the series cable, BUT THE UNIT SHOULD NOT BE
TURNED ON UNTIL REQUESTED BY THE SOFTWARE; no
operation should be performed on the unit until the program checks
that everything is correct prior to testing.
To perform good and reproductible results, its is recommended that
the device under test had maintained all it’s phases ground
connected the longest possible time before the test. The minimun
recommended length is of an hour or four times the length of the
longest cycle of voltage insertion of a previous test. This way, the
initial conditions are always the same and absorption capacitors (see
figure 2.1) could be considered discharged. Also, if tests with another
measuring equipment are going to be performed, it is therefore
recommended that the first test should be the one with the UM2B
unit.
It is necessary for the PC’s screen saver to be deactivated and the low
consumption mode disabled prior to beginning a test.
To perform a test, click on the
“Test”
button on the main menu. The system will be
initialized, which may take several seconds. During this time, the message shown in Figure
5-4 will appear.