Digital Filter Characteristics - Hioki MEMORY HiLOGGER LR8450 Instruction Manual

11.4 Digital filter characteristics

The U8550, U8551, U8552, U8553, LR8530, LR8531, LR8532, and LR8533 have a digital filter.
The cutoff frequency is set automatically based on the measurement module type, number of
channels in use, data refresh interval, power supply frequency filter, and wire break detection
setting.
If you need to reject the power supply's line frequency, you can obtain a high level of noise rejection
performance by setting the cutoff frequency so that it matches the power supply's line frequency.
For more information about the cutoff frequency, see the sections about individual modules' digital
filters in "10.2 Plug-in Module Specifications" (p. 3 10).
The following figures offer a typical example of the digital filter characteristics for the U8550
Voltage/Temp Module when using a data refresh interval of 10 s:
Cutoff frequency: 50 Hz
Cutoff frequency: 60 Hz
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