Yokogawa µR20000 - Manual (Page 22)

IM 04P02B01-01E
For the procedure to set the functions, see section 1.10, “Function Setup Guide.”
1-6
1.2 Measurng Input Secton
Integraton Tme of the A/D Converter
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 Integraton Tme 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.
• If Auto is specified when using the 24-VDC power supply on a recorder with the
24-VDC/AC power supply (/P1 option), the integration time is fixed to 20 ms (50 Hz).
• 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 varies depending on the integration time setting
(see page 1-2).
<Related Topcs> Setting the A/D integration time: Section 7.2