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5.3.3
Inrush and RPM Configuration
The Inrush window allows you to set up the criteria for capturing a motor inrush.
Inrush Current:
1. Select the start threshold for current RMS. The inrush recording begins when
the ARMS threshold is reached.
2. Select the hysteresis percentage for ending the inrush capture. The inrush
recording ends when the current is below the threshold minus the hysteresis
percentage, or when the maximum number of datapoints have been cap-
tured.
RPM:
The
parameter defines the threshold voltage value used to detect an event
(pulse on the tachometer signal). Since the signal received by the Model 8220 can
be unipolar or bipolar, two types of threshold (0.3 and 1.1V) can be selected. The
recommended selection is as follows:
•
bipolar signals: 0.3V threshold
•
unipolar signals: 1.1V threshold
In both cases, the hysteresis is 0.2 V.
The value is set using the White and Yellow (
54
Figure 5-7
) buttons.
Power Quality Analyzer Model 8220
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