User Documentation
87
Supported operating systems – Functions
2008050000/03/02-2018
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3.5.26 Palette - ITI statistics (CBEMA)
The ITIC or CBEMA curve (Computer Business Equipment Manufacturers Association) describes the maxi-
mum voltage deviation in relation to the event duration that an electronic device has to be able to tolerate.
Thecurvedenespermittedtolerancesforevaluationofevents,thusenablinginterpretationofanymalfunc-
tions and can be used as evaluation benchmark.
A point in the diagram represents the voltage deviations presented on the Y-axis (voltage outages, voltage
drops or overvoltages) linked with the duration presented on the X-axis, thus describing the event. These val-
ues should be within the permitted range of the CBEMA curve.
How:
• By selecting the “Graphs” node in the Projects window and the Palette window display.
Brief description:
• Creates a CBEMA in the graphs window without measurement value assignment.
Steps:
• Select the “Graphs” node in the projects window.
• Using the menu item “Window --> Palette”, open the palette window.
• Drag the “ITIC (CBEMA)statistics” symbol while holding the mousekey down to the Graphs window. A
CBEMA diagram appears.
• Drag a read-out device from the project window (see “Download memory”), a Energy Analyser D550, for
example, over the respective area of the diagram.
• Saved events will then appear in the diagram as points.
Interpretation of the display: Events within the coloured areas are outside the tolerance range. Overvoltage
(red zone) can lead to a defect, undervoltage (yellow zone) to a temporary outage of the device.