Measurement Computing LogBook Series - Manual (Page 124)

8-2 CE Compliance 949297 LogBook User’s Manual
For clarification, terms used in some Declarations of Conformity include:
• pollution degree: any addition of foreign matter, solid, liquid or gaseous (ionized gases) that
may produce a reduction of dielectric strength or surface resistivity. A pollution degree I has
no influence on safety and implies: the equipment is at operating temperature with non-
condensing humidity conditions; no conductive particles are permitted in the atmosphere;
warm-up time is sufficient to avert any condensation or frost; no hazardous voltages are
applied until completion of the warm-up period. Pollution degree II implies the expectation
of occasional condensation.
• overvoltage (installation) category: classification with limits for transient over-voltage,
dependent on the nominal line voltage to earth. Category I implies signals without high
transient values. Category II applies to typical mains power lines with some transients.
Safety Conditions
Users must comply with all relevant safety conditions listed in the Declarations of Conformity and in the
user documentation. This manual, LogBook, and Daq device hardware use the following Warning and
Caution symbols:
(If you see these symbols on a product, carefully read the related information and be alert to the possibility
of personal injury).
This warning symbol is used in this manual or on the equipment to warn of possible
injury or death from electrical shock under noted conditions.
This warning/caution symbol is used to warn of possible personal injury or equipment
damage under noted conditions.
LogBook and Daq device products contain no user-serviceable parts; refer all service to qualified
personnel.
The specific safety conditions for CE compliance vary by product; but general safety conditions
include:
• The operator must observe all safety cautions and operating conditions specified in the
documentation for all hardware used.
• The host computer and all connected equipment must be CE compliant.
• All power must be off to the device and externally connected equipment before internal access to
the device is permitted.
• Isolation voltage ratings: do not exceed documented voltage limits for power and signal inputs.
All wire insulation and terminal blocks in the system must be rated for the isolation voltage in use.
Voltages above 30 Vrms or ±60 VDC must not be applied if any condensation has formed on the
device.
• Current and power use must not exceed specifications. Do not defeat fuses or other over-current
protection.