Measurement Computing DaqScan 2000 Series - Manual (Page 47)

CE Compliance & Noise Considerations 7
Overview ……7-1
CE Standards and Directives …… 7-1
Safety Conditions ……7-2
Emissions/Immunity Conditions ……7-2
CE Enhancements for DBKs .…… 7-3
CE Compliance for System Expansion …… 7-3
Noise Considerations …… 7-4
Overview
CE-compliant products bear the “CE” mark and include a Declaration of Conformity
stating the particular specifications and conditions that apply. The test records and
supporting documentation that validate the compliance are kept on file at the
factory.
The European Union established CE standards in 1985. The standards include specifications
for safety, EMI emissions, and immunity from electromagnetic interference. Products that are
intended for placement in the European Union must meet or exceed the standards and bear
the "CE" mark.
Although not required in the USA, meeting or exceeding the CE standards is considered good
engineering practice, since doing so enhances safety while reducing noise and ESD problems.
In contracted and in-house testing, most Daq products met the required specifications. In
many cases, products that were not originally in compliance were redesigned accordingly. In
noted instances, alternate product versions, shield plates, edge guards, special connectors, or
add-on kits are required to meet CE compliance.
CE Standards and Directives
The electromagnetic compatibility (EMC) directives specify two basic requirements:
1. The device must not interfere with radio or telecommunications.
2. The device must be immune from electromagnetic interference from RF transmitters,
etc.
The standards are published in the Official Journal of European Union under direction of
CENELEC (European Committee for Electrotechnical Standardization). The specific standards
relevant to Daq equipment are listed on the product’s Declaration of Conformity.
The safety standard that applies to Daq products is EN 61010-1:1993 (Safety Requirements
for Electrical Equipment for Measurement, Control, and Laboratory Use, Part 1: General
Requirements). Environmental conditions include the following:
• indoor use
• altitude up to 2000 m
• temperature 5°C to 40°C (41°F to 104°F)
• maximum relative humidity 80% for temperatures up to 31°C (87.8°F) decreasing
linearly to 50% relative humidity at 40°C (104°F)
• mains supply voltage fluctuations not to exceed ±10% of the nominal voltage
• other supply voltage fluctuations as stated by the manufacturer
• transient overvoltage according to installation categories (overvoltage categories) I, II
and III. For mains supply, the minimum and normal category is II.
• pollution degree I or II in accordance with IEC 664
DaqLab/2000 Series and DaqScan/2000 Series 959195 CE-Compliance & Noise Considerations 7-1