Measurement Computing LogBook Series - Manual (Page 123)

LogBook User’s Manual 949297 CE Compliance 8-1
CE Compliance 8
Overview ...... 8-1
CE Standards and Directives ...... 8-1
Safety Conditions ...... 8-2
Emissions/Immunity Conditions ...... 8-3
CE Enhancements for Existing Products ...... 8-3
Edge Guards for DBK5, DBK8, and DBK44 ...... 8-3
DBK41/CE ...... 8-3
BNC Connectors for CE Compliance ...... 8-4
Overview
CE standards were developed by the European Union (EU) dating from 1985 and include specifications
both for safety and for EMI emissions and immunity. Now, all affected products sold in EU countries must
meet such standards. Although not required in the USA, these standards are considered good engineering
practice since they enhance safety while reducing noise and ESD problems.
In contracted and in internal tests, most of our products met the required specifications. Products that were
not originally in compliance were redesigned accordingly. In some cases, alternate product versions, shield
plates, edge guards, special connectors, or add-on kits are required to meet CE compliance.
CE-compliant products bear the “CE” mark and include a Declaration of Conformity stating the
particular specifications and conditions that apply. Test Records and supporting documentation
that validate compliance are kept on file at the factory.
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 LogBook
or Daq device equipment are listed on the product’s Declaration of Conformity and include:
CISPR22:1985; EN55022:1988 (Information Technology Equipment, Class A for commercial/industrial
use); and EN50082-1:1992 for various categories of EMI immunity.
The safety standard that applies to LogBook and Daq device 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 over-voltage according to installation categories (over-voltage 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