Measurement Computing IOtech 640 Series - Manual (Page 57)

640 & 650 Series 917093 CE-Compliance & Noise Considerations 8-3
Emissions/Immunity Conditions
The specific immunity conditions for CE compliance vary by product; but general immunity conditions
include:
• Cables must be shielded, braid-type with metal-shelled connectors. Input terminal connections are to
be made with shielded wire. The shield should be connected to the chassis ground with the hardware
provided.
• The host computer must be properly grounded.
• In low-level analog applications some inaccuracy is to be expected when I/O leads are exposed to
RF fields or transients over 3 or 10 V/m as noted on the Declaration of Conformity.
CE Rules of Thumb for 640 and 650 Series Devices
IOtech 640/650 Series units are CE Compliant at the time they leave the factory. They will remain in
compliance providing that the conditions stated on their associated Declaration of Conformity continue to
be met.
A few general rules of thumb regarding 640/650 Series and CE compliance:
• Use short cables.
• When possible use shielded cables.
• When assembling or disassembling components, take ESD precautions,
including the use of grounded wrist straps.
• Ensure that the host computer is CE Compliant.
• Review the most recent Declaration of Conformity for each device.
• Ensure all system components are properly grounded.