Omega RD100B User Manual page 20

1.2 Measuring Input Section
Integration Time of the A/D Converter
1-6
The recorder uses an A/D converter to convert the sampled analog signal to a digital
signal. By setting the integration time of the A/D converter 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 suppressed.
The integration time of the A/D converter is selected according to the model from the
table below.
Model Integration Time of the A/D Converter
Pen model Select 16.7 ms (60 Hz), 20 ms (50 Hz), or Auto
Dot model Select 16.7 ms (60 Hz), 20 ms (50 Hz), 100 ms or Auto
• If Auto is selected, the recorder detects the power supply frequency and automatically
selects 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 suppress the power frequency noise for either frequency, 50 Hz or 60 Hz.
• The scan interval on the dot model is 1 s when the integration time is set to 16.7 ms or
20 ms and 2.5 s when the integration time is set to 100 ms.
<Related Topics>
Setting the A/D integration time: Section 7.2