hugo Scooter, Owner'S Manual

9

Safety Notice

EMI

This portion of the content will provide the user with basic information that describes the 
problems with Electromagnetic Interference (EMI), known sources of EMI, protective 
measures either to lessen the possibility or exposure or to minimize the degree of 
exposure, and suggested action should unexpected or erratic movement occur.

Caution:

 It is very important that you read this information regarding the possible 

effects of electromagnetic interference on your electric scooter.

Electromagnetic Interference (EMI) From Radio Wave Sources

Powered vehicles may be susceptible to electromagnetic interference (EMI), which is 
interfering electromagnetic energy (EM) emitted from sources such as radio stations, TV 
stations, amateur radio (HAM) transmitters, two-way radios, and mobile phones. The 
interference (from radio wave sources) can cause the powered scooter to release its 
brakes, move by itself, or move in unintended directions. It can also permanently damage 
the powered scooter’s control system. The intensity of the interfering EM energy can be 
measured in volts per meter (V/m). Each powered scooter can resist EMI up to a certain 
intensity. This is called its “immunity level”. The higher the immunity level, the greater 
the protection. At this time, current technology is capable of achieving at least a 20 V/m 
immunity level, which would provide useful protection from the more common sources 
of radiated EMI. This powered scooter model as shipped, with no further modification, 
has an immunity level of 20 V/m without any accessories. 

There are a number of sources of relatively intense electromagnetic fields in the everyday 
environment. Some of these sources are obvious and easy to avoid. Others are not 
apparent and exposure is unavoidable. However, we believe that by following the 
warning listed below, your risk to EMI will be minimized. 

The sources of radiated EMI can be broadly classified into three types:

1. Hand-held portable transceivers ( transmitter -receivers with the antenna mounted 

directly on the transmitting unit). Examples include: citizens band (CB) radios, “ 
walkie talkie”, security, fire, and police transceivers, cellular telephones and other 
personal communication devices. 

Note:

 Some mobile telephones and similar transmit signal while they are ON, even 

when not being used. 

2. Medium-range mobile transceivers, such as those used in police cars, fire trucks, 

ambulances and taxis. These usually have the antenna mounted on the outside of the 
vehicule.