Spirolab
Rev.1.8
Page 15 of 60
set to provide appropriate protection against interference when the device is used in the
home. This device generates, uses and can emit radio signals and, if not installed or used
as per instructions, can create interference with radio communications.
The absence of interference cannot however be guaranteed for all installations.
If this device causes interference to radio or TV reception (that can be determined by
turning the device on and off), we recommend the user corrects the interference by
adopting one of more of the counter measures listed below:
•
Change the angle or position of the antenna.
•
Increase the distance between the device and the appliance receiving the signal.
•
Connect the device to a different power socket than the one used by the appliance
receiving the signal.
•
Contact the supplier or radio/TV technician for expert advice.
The symbols defined may be found on the device ID label.
1.3.3
Electrostatic discharge symbol
This symbol is used near every connector that has been excluded from the electrostatic
discharge test.
WARNING
The contacts of connectors identified with the ESD warning symbol should not be
touched and connections should not be performed before appropriate precautionary
electrostatic discharge (ESD) measures are undertaken.
Below are examples of such precautionary measures:
Environmental procedures: air conditioning, humidification, conductive floor-covering
substances, use of non-synthetic clothing
User procedures: discharge using large metal objects; use of an ESD wrist strap.
Any staff that uses devices affected by electrostatic discharge should receive adequate
explanations concerning the ESD symbol and adequate training on the effects of
electrostatic discharge and on the measures to be undertaken to prevent such effects.
An electrostatic discharge is defined as an electric charge at rest. It is the sudden flow of
electricity between two objects in contact, an electrical short or a dielectric breakdown.
ESD may be caused by a build-up of static electricity or by electrostatic induction. At low
relative humidity, charge generation will increase significantly due to the dry environment.
Common plastics create higher charge levels.
Typical values of voltages caused by electrostatic discharges are shown below:
Walking on a carpet
1500-35000 Volts
Walking on an untreated vinyl floor
250-12000 Volts
