3M CTM082 Manuel de l'utilisateur - Page 6
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Operation
When the 3M
ESD Pro is turned on, it is ready to detect, count and measure
™
ESD events.
Bar Graph Display
The 10-LED bar graph shows the relative strength of an ESD event. If an
ESD event does not exceed the set alarm level, LEDs indicating its strength
are green. Whenever the strength of an event exceeds the set threshold, LEDs
turn red.
Event strength is a factor of many variables:
•
the accumulated static voltage
•
the capacitance of the charged objects (a larger object holds more charge
than a smaller one)
•
the physical size of discharging objects
•
the environment
•
the distance from ESD event occurrence
Therefore, one should exercise good judgement in comparing the strength of
ESD events captured under different conditions.
Threshold Adjustment
The 3M
ESD Pro can detect ESD events in a wide dynamic range. For most
™
applications, only the events that exceed certain strengths are of importance.