Omega RD-MV100 Series User Manual page 22

1.2 Functions of the Input Section
Moving average value
Integration Time of the A/D Converter
1-4
Moving average (RD-MV106, and RD-MV112)
The input signal of the measurement channel is set to the averaged value of the m most
current data points (the number of moving-averaged data points) acquired at the scan
interval. The number of moving-averaged data points can be set in the range 2 to 16.
The moving average is initially turned OFF.
The figure below shows an example indicating the operation of the buffer for the moving
average computation when the number of moving averaged data points is set to "5."
Buffer data at the
nth sampling
10.0 mV
1
2 5.0 mV
3 0.0 mV
–5.0 mV
4
–10.0 mV
5
0.0 mV
The recorder uses an A/D converter to convert the sampled analog signal to a digital
signal. By setting the integration time to match the time period corresponding to one
cycle of the power supply or an integer multiple of one cycle, the power supply frequency
noise can be effectively eliminated. The integration time of the A/D converter is selected
according to the model from the table below. If "Auto" is selected, the recorder will
automatically detect the power supply frequency and select 16.7 ms or 20 ms. Because
100 ms is an integer multiple of 16.7 ms and 20 ms, this setting can be used to eliminate
the power frequency noise for either frequency, 50 Hz or 60 Hz. 100 ms is available on
the RD-MV106, and RD-MV112. For the setting procedure, see section 5.9.
Model Integration Time of the A/D Converter
RD-MV102/RD-MV104 Select 16.7 ms (60 Hz), 20 ms (50 Hz), or auto (automatically switches
16.7 ms/20 ms, fixed to 20 ms for 12 VDC power supply model)
RD-MV106/RD-MV112 Select 16.7 ms (60 Hz), 20 ms (50 Hz), 100 ms, or auto (automatically
switches 16.7 ms/20 ms, fixed to 20 ms for 12 VDC power supply model)
Buffer data at the
n+1th sampling
New data
15.0 mV
10.0 mV
5.0 mV
0.0 mV
–5.0 mV
Deleted
5.0 mV
Buffer data at the
n+2th sampling
New data
10.0 mV
15.0 mV
10.0 mV
5.0 mV
0.0 mV
Deleted
8.0 mV