Omicron VBO3, User Manual

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6.2 Calculation of voltage ratio
Without load, the voltage ratio between the primary and secondary side of VBO3 is roughly 1 : 2.16. In
real-life testing scenarios with load, however, the voltage ratio will be lower. To ensure accurate testing
conditions, you need to determine the true voltage ratio under load conditions and enter the
corresponding value in
Test Universe . You can determine the voltage ratio using a multimeter that
fulfills the requirements for measurement categories CATIII/1000V and CATIV/600V. It is important that
you always connect the load before measuring the output voltages (see workflow below).
WARNING
Avoid serious injury or death caused by electric shock.
► Always measure the output voltages with a multimeter suitable for up to 1000 V
working voltage because at the VBO3 outputs, voltages higher than 600 V might
occur due to the voltage ratio of about 1 : 2.16.
► Do not use a CMC test set for measuring the output voltages. CMC test sets are
designed for input voltages of max. 600 V. Due to the VBO3 's voltage ratio of about
1 : 2.16, voltages higher than 600 V might occur.
Configuring VBO3 in the control software
OMICRON 17