![background image](http://html1.mh-extra.com/html/m-system/47llc/47llc_operating-manual_3126851107.webp)
107
47LLC OPERATING MANUAL EM-9505-B Rev.4
12. AVERAGING INPUT
Moving average processing of measured values is configurable. The number of samples in processing the moving average
can be selected in the following table. This operation averages sampled values, and then, averages with a new sample
added and the oldest one omitted. Such operation is repeated as shown in the following figure. For instance, when ‘A 4’ is
selected, the moving average processing with 4 samples (100 millisecond intervals) is repeated. Moving average is used
to remove periodic varied noise superimposed on the input signal and suppress the display flickering.
■
NUMBER OF sAMPLEs
DISPLAY
FUNCTION
DEFAULT VALUE
No moving averaging
Moving average with 2 samples (50 millisecond intervals)
Moving average with 4 samples (100 millisecond intervals)
Moving average with 8 samples (200 millisecond intervals)
Moving average with 16 samples (400 millisecond intervals)
Moving average with 32 samples (800 millisecond intervals)
Moving average with 64 samples (1.6 second intervals)
■
EXAMPLE OF MOVING AVERAGE WITH 4 sAMPLEs
(1) The moving average operation starts immediately after the power is on or the moving average is set. Until the sampling
No. reaches the set value, all samples are averaged every 25 milliseconds.
(2) After the sampling No. reaches the set value, a new sample is added to be averaged with the oldest one omitted. Such
operation is repeated.
NOTE
The moving average setting affects the DC output when the analog output function mode is set to “proportional to the
display value”. Refer to 10. SETTING ANALOG OUTPUT FUNCTION for details.
Measured value
Sampling
Moving averaging Average
25 milliseconds
Display value
25 milliseconds
Refreshing measured
and average values
(1)
(2)
H