ISO 26142:2010
Hydrogen detection apparatus — Stationary applications
ISO 26142:2010 defines the performance requirements and test methods of hydrogen detection apparatus that is designed to measure and monitor hydrogen concentrations in stationary applications. The provisions in ISO 26142:2010 cover the hydrogen detection apparatus used to achieve the single and/or multilevel safety operations, such as nitrogen purging or ventilation and/or system shut-off corresponding to the hydrogen concentration. The requirements applicable to the overall safety system, as well as the installation requirements of such apparatus, are excluded. ISO 26142:2010 sets out only the requirements applicable to a product standard for hydrogen detection apparatus, such as precision, response time, stability, measuring range, selectivity and poisoning.
ISO 26142:2010 is intended to be used for certification purposes.
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Scope
Normative references
Terms and definitions
General requirements
Construction
General
Enclosure
Measuring range
Alarm system
Alarm
Fault signals
Indicators
Power indication
Signals for recording
Measuring range
Indicating colours
Adjustments
Software-controlled hydrogen detection apparatus
General
Conversion errors
Special state indication
Software
Data transmission
Self-test routines
Functional concept
Reliability
Labelling and marking
Instruction manual
Vibration
Performance requirements
Tests
General requirements for tests
Number of samples
Sequence of tests
Preparation of the hydrogen detection apparatus before testi
Test equipment
Normal test conditions
Temperature
Pressure
Humidity
Voltage
Orientation
Test methods
General
Standard response test
Standard test gas
Procedure
Measuring range and calibration
Initial preparation of the hydrogen detection apparatus
Validation of accuracy (calibration curve)
Stability
Repeatability
Long-term stability
Alarm set point(s)
General
Increasing hydrogen volume fraction
Temperature
Test condition
Requirement
Pressure
Humidity
Vibration
Test equipment
Procedures
Vibration levels
Tolerance
Orientation
Flow rate for aspirated apparatus
Air velocity
Test condition
Requirement
Time of response and time of recovery
Selectivity
Poisoning
Operation above the measuring range
Power supply variations
Power supply interruptions, voltage transients and step chan
General
Short interruption of power supply
Voltage transients
Step changes of voltage without interruption
Warm-up time after restart
Electromagnetic immunity
Field calibration kit
Test condition
Requirement
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Scope
Normative references
Terms and definitions
General requirements
Construction
General
Enclosure
Measuring range
Alarm system
Alarm
Fault signals
Indicators
Power indication
Signals for recording
Measuring range
Indicating colours
Adjustments
Software-controlled hydrogen detection apparatus
General
Conversion errors
Special state indication
Software
Data transmission
Self-test routines
Functional concept
Reliability
Labelling and marking
Instruction manual
Vibration
Performance requirements
Tests
General requirements for tests
Number of samples
Sequence of tests
Preparation of the hydrogen detection apparatus before testi
Test equipment
Normal test conditions
Temperature
Pressure
Humidity
Voltage
Orientation
Test methods
General
Standard response test
Standard test gas
Procedure
Measuring range and calibration
Initial preparation of the hydrogen detection apparatus
Validation of accuracy (calibration curve)
Stability
Repeatability
Long-term stability
Alarm set point(s)
General
Increasing hydrogen volume fraction
Temperature
Test condition
Requirement
Pressure
Humidity
Vibration
Test equipment
Procedures
Vibration levels
Tolerance
Orientation
Flow rate for aspirated apparatus
Air velocity
Test condition
Requirement
Time of response and time of recovery
Selectivity
Poisoning
Operation above the measuring range
Power supply variations
Power supply interruptions, voltage transients and step chan
General
Short interruption of power supply
Voltage transients
Step changes of voltage without interruption
Warm-up time after restart
Electromagnetic immunity
Field calibration kit
Test condition
Requirement