Qualitrol INFORMA PMD-A, User Manual

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Appendix B – INFORMA PMD-A Functions
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Note that the sensors of the UA-Under, UA-Over, and UA-Both types will not
trigger an RMS Envelope, although these sensors use an algorithm identical to
that of DSI.
Handling Time Changes
When the user is setting the device time, it can be shifted forward or backward from the
current set time using the iQ+ software.
Forward Time Shift
If the user has set the device time ahead of the current device time, then the situation is
referred to as a “Forward time shift”.
• Forward time shift of less than 10 minutes:
o
The 10-second frequency counts will decrease in the EN 50160 reports (standard
threshold and user threshold) equivalent to the amount of drift.
o
In a 10-minute permanent recording, the timestamps and frequency values in the
drift duration are set to zero.
o
In free interval recording, if the aggregation duration is configured for less than or
equal to 10 minutes, then the new segment is formed. If the aggregation duration is
configured for more than 10 minutes, the data corresponding to the duration of drift
will not be available.
o
In the IEC 61000 report, data will not be available for the duration of the drift.
o
In free interval histogram, if there is no impact for all other reports when the
aggregation duration is configured for less than or equal to 10 minutes, then the new
report is formed from the newly set time. If the aggregation duration is configured for
more than 10 minutes, then the data is not available for the duration of the drift.
o
There is no impact on a 10-minute Histogram.
•
Forward time shift of more than 10 minutes:
o
A new segment is formed in both 10-minute permanent recording and free interval
recording.
o
All other reports (EN 50160 standard threshold, EN 50160 user threshold, IEC
61000, 10-minute histogram, and free interval histogram) will be restarted from the
newly set time.
Backward Time Shift
• Backward time shift of less than 1 minute:
o
In free interval recording, if the aggregation duration is configured for less than or
equal to 1 minute, then a new segment is formed. If the aggregation duration is
configured for more than 1 minute, then there is no impact.