Hioki LR8450, Instruction Manual

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Noise Countermeasures
Example noise countermeasures
Ensuring devices are grounded reliably
• Ground the instrument and wireless modules reliably.
You can ground the chassis by connecting the AC Adapter’s grounded two-prong power cord to
an outlet with a grounding electrode.
• Ensure the measurement target’s chassis is grounded reliably.
Ensure the measurement target’s chassis is reliably connected to a suitable ground.
Measurement module
Z
2
Z
1
V in
Device under measurement
r 1
r 2
Z
3
Thermocouple
• Power the instrument and wireless modules with batteries.
You can reduce the effects of common-mode noise by powering the devices with batteries (without
connecting their AC Adapters) so that the earth current loop is eliminated.