Chapter 5 Measurement Description
Accura 2300/2350 User Guide
Page 206
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Aggregation
Accura 2300/2350 samples and processes voltage/current every 0.5-seconds and provides basic
measurement data every 0.5-second for a 0.5-second interval. Using the basic 0.5-second data, the
aggregation for longer than 0.5-second is calculated as shown in the figure below. This figure shows the
aggregation for 1-second and 5-second intervals.
Aggregation consists of a average value, a maximum/minimum value, and a time-stamp for maximum/
minimum. Average, maximum/minimum, and time-stamp are generated for each aggregation. The average
value is the average of 0.5-second data during the aggregation interval. The maximum value/minimum value
is the maximum value/minimum value among the 0.5-second data during the aggregation interval.
The time-stamp for the maximum/minimum is the difference time between the start time of the aggregation
and the occurrence time of maximum/minimum value. Therefore, the actual time for maximum/minimum can
be obtained by adding the aggregation start time and the difference time of the time-stamp.
Fig 5.13 Aggregation Process
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Fixed aggregation
Accura 2300 provides six aggregations from aggregation 1 through 6 with fixed aggregation interval[1-
second, 5-second, 1-minute, 5-minute, 1-hour, 6-hour]. In fixed aggregation, the offset time for the beginning
of the aggregation interval is fixed to zero. That is, the start of the aggregation interval is fixed to start at 0
hour 0 minute 0 second. To set the offset time to a non-zero value, you should use customed aggregation.
The measurement values displayed on Accura 2300 LCD screen are 2-second aggregation values updated
every 0.5-second, and these are provided by communication through aggregation 201 setup.
Also, the Max/Min value after the user-reset displayed on Accura 2300 LCD screen is the Max/Min values
among the 0.5-second measurement values, and these are provided by communication through aggregation
202 setup.
Aggregation name
Aggregation interval
Buffer length
Buffering time
Circular index
Aggregation 0
0.5-second (base)
120
60 seconds
0-9999
Aggregation 1
1-second
32
32 seconds
0-9999
Aggregation 2
5-second
12
60 seconds
0-9999
Aggregation 3
1-minute
12
12 minutes
0-9999
Aggregation 4
5-minute
10
50 minutes
0-9999
Summary of Contents for Accura 2300 Front
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