YOKOGAWA Daqstation DX2000, User Manual

Page: 272 / 366

9-4
IM 04L42B01-01E
• Rolling average
• On/Off
To take the rolling average of the measured results, select On .
• Interval
Select the sampling interval when taking the rolling average from the following:
The sampling interval takes on a value that is an integer multiple of the scan
interval. For example, if the sampling interval is set to 5 s when the scan interval
is 2 s, the actual sampling interval is 6 s.
• Number of samples
Set the number of samples for the rolling average using an integer between 1
and 1500.
The rolling average time is equal to the sampling interval × the number of
samples.
Note
• If the number of data points to be averaged has not reached the specified number of
samples immediately after computation is started, the average of the available data is
calculated.
• Computation error data is excluded from the rolling average computation.
• If the computed data exceeds the upper or lower limit, the data is clipped at the upper or
lower limit, and the rolling average is computed. The upper and lower limit is “±100000000”
excluding the decimal point. The decimal place is the same as that of the span lower limit.
• Memory sample > On/Off
Select On to record the computed data of the target channels.
• Math
• Value on Error
Specify whether to set the display for a computation error to +Over or –Over .
• Value on Overflow > SUM, AVE
Specify how to handle overflow data when it is detected in the SUM or AVE
computation of TLOG or CLOG. This setting is also applied to report generation.
Settings Description
Error Sets the computed result to computation error.
Skip Discards the overflow data and continues the computation.
Limit Uses a limit value in place of the overflow data and continues the computation.
• Value on Overflow > MAX, MIN, P-P
Specify how to handle overflow data when it is detected in the MAX, MIN, or P-P
computation of TLOG or CLOG. This setting is also applied to report generation.
Settings Description
Over Uses the overflow data as-is.
Skip Discards the overflow data and continues the computation.
9.1 Setting the Expression, Measurement Range, Alarm, Tag, and Data Storage on Computation Channels