Omicron Lab CT Analyzer User Manual page 155

3. Select the VT Ratio measurement type. Set the amplitude to the maximum
output voltage of 40V and the frequency to the mains frequency. Refer to
Figure 8-13.
Note: If it is necessary to suppress mains frequency interferences, use the
Advanced measurement type with a frequency of e.g. 3Hz above the mains
frequency (e.g. 53Hz) and choose the frequency-selective measurement
mode with a filter bandwidth of 6Hz. Mains frequency interferences are then
suppressed by 120 dB.
Measurement settings
Figure 8-13 CT-Quick test card with settings for VT ratio measurement
4. Start the measurement by pressing the
clicking the ON button on the VT Ratio tab of the CTA QuickTest software.
The measured values are displayed and permanently updated as long as the
measurement is active. Refer to Figure 8-14.
5. Stop the measurement by pressing the
or clicking the OFF button on the VT Ratio tab of the CTA QuickTest
software.
Live display of measured
values
Live display of VT ratio
Figure 8-14 Results test card for VT ratio measurement
Using the Quick Test Feature
key on the CT Analyzer or
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key on the CT Analyzer again
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