WHILL C2 - General Q&A on EMI and RFI; Important Information Regarding Electro Magnetic; Compatibility (EMC)

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WHILL Model C2/Ci2 User Manual
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1. Safety precautions
1.1.1. General Q&A on EMI and RFI
The following are general questions and answers regarding steps to avoid nearly all of the effects of EMI and RFI
with this device. Please use them as reference.
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Where do radio waves come from?
Radio waves are emitted by unidirectional or bidirectional radio devices. Such devices include transceivers,
mobile phones, wireless computer links, microwave generators, and radio call transmitters. Radio waves are a
form of electromagnetic energy, and the strength of the energy increases at closer distances to the transmitting
antenna. This electromagnetic field can cause problems for users of electric equipment.
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What kind of movements should I expect if a mobility device is affected by EMI or RFI?
EMI and RFI undergo extremely large dynamic changes and may affect a device depending on conditions such as
the following.
• Radio wave frequency and strength
• Structure of the power supply equipment
• Inclination of the device (whether the ground is flat or a slanted)
• Whether the device is turned on and whether it is moving
If this device is affected, there is a possibility of abnormal movement. It may begin moving uncontrollably or stop
suddenly. Strong EMI or RFI can damage the control system.
1.1.2. Important information regarding Electro Magnetic Compatibility (EMC)
Below cables information are provided for EMC reference.
Cable Max. cable length,
Shielded/unshielded
Number Cable classification
AC Power Line 1.5 m Unshielded 1 Set AC Power
DC Power Line 1.2 m Unshielded 1 Set DC Power
This electrical medical equipment needs special precautions regarding EMC and put into service according to the
EMC information provided in the user manual; The equipment conforms to this IEC 60601-1-2:2014 standard for
both immunity and emissions. Nevertheless, special precautions need to be observed:
• The equipment with no ESSENTIAL PERFORMANCE is intended used in Home healthcare environment.
• WARNING: Use of this equipment adjacent to or stacked with other equipment should be avoided because it
could result in improper operation. If such use is necessary, this equipment and the other equipment should be
observed to verify that they are operating normally.
• The use of accessories, transducers and cables other than those specified or provided by the manufacturer of
this equipment could result in increased electromagnetic emissions or decreased electromagnetic immunity of
this equipment and result in improper operation.