IEC 61779-6:1999
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
16-08-2007
English
30-06-1999
FOREWORD
INTRODUCTION
1 General
1.1 Scope
1.2 Normative references
2 Definitions
3 Measuring principles
3.1 Catalytic sensor
3.2 Thermal conductivity sensor
3.3 Electromagnetic radiation absorption sensor -
usually infrared
3.4 Semi-conductor sensor
3.5 Electrochemical sensors
3.6 Flame ionization detectors (FID)
4 Selection of apparatus
4.1 General
4.2 Selection criteria
4.3 Miscellaneous factors affecting selection of
apparatus
5 Behaviour of gas releases
5.1 Nature of a release
5.2 Outdoor sites and open structures
5.3 Buildings and enclosures
5.4 Environmental considerations
6 Installation of fixed gas detection apparatus
6.1 Basic considerations for the installation of fixed
systems
6.2 Location of sensors
6.3 Installation of sensors
6.4 Timing of installation during construction operations
6.5 Safety in fixed systems
6.6 Environmental conditions
6.7 Sample lines
6.8 Access for calibration and maintenance
6.9 Commissioning
6.10 Operating instructions, plans and records
7 Use of portable and transportable flammable gas detection
apparatus
7.1 General
7.2 Initial and periodic check procedures for portable
and transportable instrumentation
7.3 Guidance on the use of portable and transportable
apparatus
8 Special precautions for fixed and portable apparatus
9 Maintenance, routine procedures and general
administrative control
9.1 General
9.2 Operational checks
9.3 Maintenance
9.4 Sensors
9.5 Flow systems
9.6 Readout devices
9.7 Alarms
9.8 Workshop calibration test
9.9 Routine tests and re-calibration procedures
9.10 General administrative control
10 Training
Annex A (informative) Flammability limits (LFL and UFL) of
certain flammable gases and vapours
Annex B (informative) Environmental and application
check-list for flammable gas detectors (typical)
Annex C (informative) Instrument maintenance record for
flammable gas detectors (typical)
Annex D (informative) Minimum environmental demands for
IEC 61779-4 (group II 100 % LFL) and IEC 61779-5
(group II 100 % (v/v) gas)
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