UI SP-556 series, Руководство по эксплуатации

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２０．About a noise countermeasure
When influence of noise occurred, please be careful about the following.
When doing a blackout and a malfunction by influence of noise, please be
initialized. （Refer to P.14）
Please take notes of the value setting of each modes.
If it becomes normal, please take the following measure.
And please setting it once again.
（１）Do not share the power supply with a power line directly.
（When I share a power line, please use an isolation transformers）
（２）Please use 3 cores of shielding wire for a sensor , separate as much as
possible from a source of noise.
（３）Please avoid a source of noise (power supply line and inverter)，make it
as short as possible. After that,please install a sensor code.
（４）A great many noises may be included in F.G. Line of the device.
In this case you should not tie F.G. of the meter.
（５）Please separate from a power supply line,
in a case affected by noise.
And please install a EMI filter.
Fig.29
（６）The manner of the sensor cord installation.
When there is a power supply line near the sensor cord, a surge and
noise are influenced.
Therefore , install a sensor cord independently or for 50 cm or more.
Fig.30 Fig.31
（７）When being affected than other Fig.32
equipment, please use a spark killer
like Fig.32 and take a measure.
（８）If there is an unclear point, please even consult with use about a dealer
or us.
Earth Ground
Power supply
Noise filter
Short and Twist
Meter