YOKOGAWA DL750 User Manual page 422

IM 701210-06E
Statistical Processing of History Data
Performs automated measurement of waveform parameters on the waveform that is
acquired using the history memory function and performs statistical processing.
Statistical processing is performed from the oldest waveform. The range on which the
statistics are measured is the waveform that is displayed on Show Map. It can be used
with Delay and 1 cycle mode.
Target Waveforms
CH1 to CH16, DSP1 to DSP6 (optional), and Math1 to Math8
However, Math1 to Math8 are not applicable for statistical processing of history data.
Automated Measurement Parameters for Statistical Processing
The parameters on which statistical processing is performed are the parameters of
automated measurement of waveform parameters in section 11.6. The result of
statistical processing that can be displayed is only three parameters of automated
measurement.
Measurement Range for Statistical Processing
The measurement range is the same as that specified for automated measurement of
waveform parameters (see section 11.6).
Show Results
If you perform cycle statistical processing or statistical processing of history data, a list of
measured results can be displayed for the selected automated measurement
parameters. The waveforms are numbered from the oldest cycle data or history data,
and the corresponding results of automated measurement are displayed. The maximum
and minimum values of each waveform parameter are displayed using ↑ (maximum) and
↓ (minimum). If there are multiple points that are of the same value, the maximum and
minimum values are marked on the oldest data. The number of data points that can be
listed is 48000. If this value is exceeded, the most recent 48000 points of automated
measurement parameters of history waveforms or data are displayed. In this case, the
maximum and minimum values may exist outside the displayed list. In such case, ↑
(maximum) and ↓ (minimum) that are outside the range are not displayed.
In statistical processing of history data, you can select a waveform using the jog shuttle
and press SELECT to display the selected historical waveform.
In cycle statistical processing, you can select a number using the jog shuttle and press
SELECT to zoom in on the waveform (1 cycle) of the selected number. Statistical
processing is performed only on the data that can be listed.
Notes When Performing Statistical Processing
• While statistical processing is in progress,
the screen. All soft keys except the Measure Abort soft key are disabled.
• Statistical processing is not possible in the following cases.
• Realtime recorded waveforms
• FFT waveforms
• The number of data points in the measurement range (see section 11.6) is greater
than or equal to 10 Mpoints.
• Depending on the conditions such as the record length, the number of parameters on
which statistical processing is performed, and the input waveform, the execution or
termination (aborting) may take an extended time.
11.7 Performing Statistical Processing
is indicated at the upper left corner of
11
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