Information for general use
Rev. M / 73023639
A power-limited circuit is a circuit separated from other circuits by at least
BASIC INSULATION in which the direct voltage (U) is no greater than 60 V.
The current which can occur in the circuit is limited by certain measures to a
value of less than 200/U. These measures must interrupt the circuit within
120 seconds if this value is exceeded.
is the gas which is to be analyzed or measured. It is supplied to the
measuring equipment in normal operation and is also known as the
operating sample gas
is a potential to which all other voltages are referred. The potential of a
grounded point (ground potential) is used for this purpose and gives it a
value of zero volts.
Since ground connections, like all connections, have different resistances,
voltage differences or potential differences may occur between grounded
points and system parts. A correctly designed low resistance equipotential
bonding cable between the system parts or devices can eliminate these
ground potential differences.
(also known as the CAL switch) is a possible hardware isolator and part of the
concept to limit user rights. Since a change requires the housing to be
opened, this may only be done by trained personnel with the authorization of
the manufacturer.
SELV safety extra-low voltage systems which comply with DIN EN 60079-14:
The power supply to generate SELVs must ensure that no short-circuit is
possible between the primary voltage and the extra-low voltage and its
connections. It has a safe electrical isolation point (safety isolation
transformer) and complies with IEC 61558-2-6.
Live parts of circuits must not be grounded or connected to live parts or PE
wires of other circuits. All bodies of electrical equipment cannot be grounded
(for example, for electromagnetic compatibility).
(GasLab Q2 must be grounded even in a SELV system)
is an event which is only output for a short time.
Acceptance by the user is not required.
Signals are also entered into the logbook.
also called application software, is a collective term for programs that
determine the function of a device. It can be exchanged or updated by the
user.
or professional is the designation for a trained person who, as a result of
their technical training, possesses skills and experience and who is familiar
with the relevant standards and regulations. Trained personnel can assess
their work and identify potential dangers.
Hardware work on the GasLab Q2 requires, among others, the expertise
described in EN/IEC 60079-14, Annex A.
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