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Appx.
7
Influence of Noise
Appx. 6
Influence of Noise
When induction noise is caused by commercial power supply
Induction noise caused by a commercial power supply is generated by not only commercial
power lines or power outlets but also by fluorescent lights and household electrical appliances.
The noise caused by a commercial power supply depends on the frequency of the power supply
and is generated at a frequency of 50 Hz or 60 Hz.
To reduce the influence of noise caused by the commercial power supply, a method for
converting the integration time to the integral multiple of the power frequency is generally used.
(Figure. Noise caused by commercial power supply)
The measurement speed of this instrument is FAST or SLOW. In a high resistance
measurement, the measured value may not be stabilized. In such a case, reduce the
measurement speed or take appropriate measures to reduce noise.
If the instrument is used with a power frequency setting of 60 Hz in a 50 Hz area, the measured
value fluctuates even if the measurement speed is set so that the integration time becomes the
integral multiple of the power frequency. Check the instrument power frequency setting.
Measurement signal superimposed on power supply noise
Ideal measurement
signal (direct current)
Integration time
Figure. Noise caused by commercial power supply
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Appx.
Ind.
Содержание ST5520
Страница 2: ......
Страница 8: ...vi Contents ...
Страница 22: ...14 Usage Notes ...
Страница 56: ...48 Announcing the Judgment Results Using a Beep Sound ...
Страница 82: ...74 Initializing the System Reset ...
Страница 88: ...80 Deleting the Panel Data ...
Страница 158: ...150 Command Reference ...
Страница 193: ...Appx 13 Rack Mounting Screw location dimensional drawing 10 9 8 7 6 5 4 3 2 1 Appx Ind ...
Страница 194: ...Appx 14 Dimensional Diagram Appx 8 Dimensional Diagram 166 2 215 1 14 1 80 1 ...
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