EN 54-26Fire detection and fire alarm systems – Part 26: Carbon monoxide detectors – Point detectors
1 Scope
This European Standard specifies requirements, test methods and performance criteria for point detectors using carbon monoxide sensing for use in fire detection and fire alarm systems in and around buildings (see EN 54-1:2011).
This European Standard provides for the assessment and verification of consistency of performance (AVCP) of carbon monoxide point detectors to this EN.
This European Standard does not apply to fire detectors incorporating at least one CO sensing element in combination with other elements sensing different fire phenomena.
CO detectors having special characteristics suitable for the detection of specific fire risks are not covered by this European Standard. The performance requirements for any additional functions are beyond the scope of this European Standard (e.g. additional features or enhanced functionality for which this standard does not define a test or assessment method).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 54-1:2011, Fire detection and fire alarm systems — Part 1: Introduction
EN 54-7:2000 , Fire detection and fire alarm systems — Part 7: Smoke detectors — Point detectors using scattered light, transmitted light or ionization
EN 50130-4:2011, Alarm systems — Part 4: Electromagnetic compatibility — Product family standard: Immunity requirements for components of fire, intruder, hold up, CCTV, access control and social alarm systems
EN 60068-1:2014, Environmental testing — Part 1: General and guidance (IEC 60068-1:2013)
EN 60068-2-1:2007, Environmental testing — Part 2-1: Tests — Test A: Cold (IEC 60068-2-1:2007)
EN 60068-2-2:2007, Environmental testing — Part 2-2: Tests — Test B: Dry heat (IEC 60068-2-2:2007)
EN 60068-2-6:2008, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal) (IEC 60068-2¬6:2007)
EN 60068-2-27:2009, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock (IEC 60068¬2-27:2008)
EN 60068-2-30:2005, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle) (IEC 60068-2-30:2005)
EN 60068-2-42:2003, Environmental testing — Part 2-42: Tests — Test Kc: Sulphur dioxide test for contacts and connections (IEC 60068-2-42:2003)
EN 60068-2-78:2013, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state (IEC 60068-2-78:2012)
ISO 209:2007, Wrought aluminium and aluminium alloys — Chemical composition and forms of products — Part 1: Chemical composition
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 54-1:2011 and the following apply. 3.1.1
CO response value
CO concentration in the proximity of the specimen at the moment that it generates an alarm signal, when tested as described in 5.1.5
Note 1 to entry: The response value may depend on signal processing in the detector and in the control and indicating equipment.
3.1.2
rate-sensitive
behaviour of a detector that depends on the rate of change of CO concentration
3.2 Abbreviations
EMC Electromagnetic compatibility
4 Requirements
4.1 General
In order to comply with this standard, the detector shall meet the requirements of this clause, which shall be verified by visual inspection or engineering assessment or shall be tested as described in Clause 5.
4.2 Nominal activation conditions/sensitivity
4.2.1 Individual alarm indication
The detector shall be provided with an integral red visual indicator, by which the individual detector that released an alarm, can be identified, until the alarm condition is reset. Where other conditions of the detector can be visually indicated, they shall be clearly distinguishable from the alarm indication, except when the detector is switched into a service mode. For detachable detectors, the indicator may be integral with the base or the detector head. The visual indicator shall be visible from a distance of 6 m directly below the detector, in an ambient light intensity up to 500 lux when assessed as described in 5.2.1.
4.2.2 Rate sensitive CO response
The CO response value of the detector may depend on the rate of change of CO concentration in the vicinity of the detector. Such behaviour may be incorporated in the detector design to improve the discrimination between ambient CO levels and those generated by a fire. If such rate sensitive behaviour is included then it shall not lead to a significant reduction in the detector’s sensitivity to fires, nor to a significant increase in the probability of false alarm when assessed as specified in 5.2.2.
4.2.3 Response to slowly developing fires
Point carbon monoxide detectors may incorporate provision for “drift compensation”, for example to compensate for sensor drift due ageing of the CO sensor or the build-up of contaminants in the detector, If such drift compensation is included, then it shall not lead to a significant change in the detector’s sensitivity to slowly developing fires when assessed as specified in 5.2.3.
4.2.4 Repeatability
The detector shall have stable behaviour with respect to its sensitivity after a number of alarm conditions and shall meet the requirements specified in 5.2.4.
4.2.5 Directional dependence
The sensitivity of the detector shall not be unduly dependent on the direction of airflow around it and shall meet the requirements specified in 5.2.5.
4.2.6 Reproducibility
The sensitivity of the detector shall not vary unduly from specimen to specimen and shall meet the requirements specified in 5.2.6.
4.2.7 Air movement
The sensitivity of the detector shall not be unduly affected by the rate of the airflow and shall meet the requirements specified in 5.2.7.
4.3 Operational reliability
4.3.1 Connection of ancillary devices
Where the detector provides for connections to ancillary devices (e.g. remote indicators, control relays), open- or short-circuit failures of these connections shall not prevent the correct operation of the detector.
4.3.2 Monitoring of detachable detectors
For detachable detectors, a means shall be provided for a remote monitoring system (e.g. the control and indicating equipment) to detect the removal of the head from the base, in order to give a fault signal.
4.3.3 Manufacturer’s adjustments
It shall not be possible to change the manufacturer’s settings except by special means (e.g. the use of a special code or tool) or by breaking or removing a seal.
4.3.4 On-site adjustment of behaviour
If there is provision for on-site adjustment of the response behaviour of the detector then:
4.3.5 Software controlled detectors
4.3.5.1 General
For detectors which rely on software control in order to fulfil the requirements of this standard, the requirements of 4.3.5.2, 4.3.5.3 and 4.3.5.4 shall be met.
4.3.5.2 Software documentation
4.3.5.2.1 Design overview
The manufacturer shall submit documentation which gives an overview of the software design. This documentation shall be in sufficient detail for the design to be inspected for compliance with this standard and shall include at least the following:
4.3.5.2.2 Design detail
The manufacturer shall have available detailed design documentation, which only needs to be provided if required by the testing authority. It shall comprise at least the following:
4.3.5.3 Software design
In order to ensure the reliability of the detector, the following requirements for software design shall apply:
The program necessary to comply with this standard and any pre-set data, such as manufacturer’s settings, shall be held in non-volatile memory. Writing to areas of memory containing this program and data shall only be possible by the use of some special tool or code and shall not be possible during normal operation of the detector.
Site-specific data shall be held in memory which will retain data for at least two weeks without external power to the detector, unless provision is made for the automatic renewal of such data, following loss of power, within 1 h of power being restored.
4.3.6 Long term stability
The detectors shall be stable over long periods of time as specified in 5.3.6.
4.4 Tolerance to supply voltage — Variation in supply parameters
Within the specified range(s) of the supply parameters, the sensitivity of the detector shall not be unduly dependent on these parameters (e.g. voltage) and shall meet the requirements specified in 5.4.1.
4.5 Performance parameters under fire conditions — Fire sensitivity
The detector shall have adequate sensitivity to incipient type fires that may occur in buildings as specified in 5.5.1.
4.6 Durability of nominal activation conditions/sensitivity
4.6.1 Temperature resistance
4.6.1.1 Dry heat (operational)
The detector shall function correctly at high ambient temperatures as specified in 5.6.1.1.
4.6.1.2 Dry heat (endurance)
The detector shall be capable of withstanding long term exposure to high temperature as specified in 5.6.1.2.
4.6.1.3 Cold (operational)
The detector shall function correctly at low ambient temperatures, as specified in 5.6.1.3.
4.6.2 Humidity resistance
4.6.2.1 Damp heat, cyclic (operational)
The detector shall function correctly at a high level of relative humidity with short period of condensation, as specified in 5.6.2.1.
4.6.2.2 Damp heat steady-state (operational)
The detector shall function correctly at high relative humidity (without condensation) as specified in 5.6.2.2.
4.6.2.3 Damp heat steady-state (endurance)
The detector shall be capable of withstanding long term exposure to a high level of continuous humidity as specified in 5.6.2.3.
4.6.2.4 Low humidity, steady-state (operational)
The detector shall function correctly at low relative humidity as specified in 5.6.2.4.
4.6.3 Corrosion resistance — SO2 corrosion (endurance)
The detector shall be capable of withstanding the corrosive effects of sulphur dioxide as an atmospheric pollutant as specified in 5.6.3.
4.6.4 Shock and vibration resistance
4.6.4.1 Shock (operational)
The detector shall function correctly when submitted to mechanical shocks which are likely to occur in the service environment as specified in 5.6.4.1.
4.6.4.2 Impact (operational)
The detector shall function correctly when submitted to mechanical impacts which it may sustain in the normal service environment as specified in 5.6.4.2.
4.6.4.3 Vibration, sinusoidal (operational)
The detector shall function correctly when submitted to vibration at levels appropriate to its normal service environment as specified in 5.6.4.3.
4.6.4.4 Vibration, sinusoidal (endurance)
The detector shall be capable of withstanding long exposure to vibration at levels appropriate to the service environment as specified in 5.6.4.4.
4.6.5 Electrical stability — EMC, immunity (operational)
The detector shall operate correctly when submitted to electromagnetic interference as specified in 5.6.5.1.
4.6.6 Resistance to chemical agents
4.6.6.1 Exposure to high level of carbon monoxide
The detector shall be capable to withstand exposure to high levels of CO which may be encountered during a fire condition as specified in 5.6.6.1.
4.6.6.2 Exposure to chemical agents at environmental concentrations
The detector shall be capable of withstanding the effects of exposure to atmospheric pollutants or chemicals which may be encountered in the service environment as specified in 5.6.6.2.
5 Test and assessment methods 5.1 General
5.1.1 Atmospheric conditions for tests
Unless otherwise stated in a test procedure, the testing shall be carried out after the test specimen has been allowed to stabilize in the standard atmospheric conditions for testing as described in EN 60068-1 as follows:
If variations in these parameters have a significant effect on a measurement, then such variations should be kept to a minimum during a series of measurements carried out as part of one test on one specimen.
The ambient concentration of CO shall not exceed 3 ^l/l.
5.1.2 Operating conditions for tests
If a test method requires a specimen to be operational, then the specimen shall be connected to suitable supply and monitoring equipment with characteristics as required by the manufacturer’s data. Unless otherwise specified in the test method, the supply parameters applied to the specimen shall be set within the manufacturer’s specified range(s) and shall remain substantially constant throughout the tests. The value chosen for each parameter shall normally be the nominal value, or the mean of the specified range. If a test procedure requires a specimen to be monitored to detect any alarm or fault signals, then connections shall be made to any necessary ancillary devices (e.g. through wiring to an end-of-line device for conventional detectors) to allow a fault signal to be recognized.
The details of the supply and monitoring equipment and the alarm criteria used should be given in the test report.
5.1.3 Mounting arrangements
The specimen shall be mounted by its normal means of attachment and in its normal orientation in accordance with the manufacturer’s instructions. If these instructions describe more than one method of mounting, or more than one acceptable orientation, then the method considered to be most unfavourable shall be chosen for each test.
5.1.4 Tolerances
Unless otherwise stated, the tolerances for the environmental test parameters shall be as given in the basic reference standards for the test (e.g. the relevant part of EN 60068).
If a requirement or test procedure does not specify a tolerance or deviation limits, then deviation limits of ± 5 % shall be applied.
5.1.5 Measurement of CO response value
The specimen, for which the CO response value shall be measured, shall be installed in the gas test chamber, described in Annex A, in its normal operating position, by its normal means of attachment. The orientation of the specimen, relative to the direction of airflow, shall be the least sensitive orientation, as determined in the directional dependence test, unless otherwise specified in the test procedure.
Before commencing each measurement, the gas test chamber shall be purged with clean air to ensure that the concentration of CO in the chamber is less than 1,5 ^l/l.
The air velocity in the proximity of the specimen shall be (0,2 ± 0,04) m/s unless otherwise specified in the test procedure.
Unless otherwise specified in the test procedure, the air temperature in the gas test chamber shall be (23 ± 5)°C and shall not vary by more than 5 K for all the measurements.
The specimen shall be connected to its supply and monitoring equipment as described in 5.1.2, and shall be allowed to stabilize for a period of at least 15 min, unless otherwise specified by the manufacturer.
5.1.6 Provision for tests
The following shall be provided for testing compliance with this standard:
The specimens submitted shall be deemed representative of the normal production with regard to their construction and calibration.
This implies that the mean response value of the 25 specimens found in the reproducibility test, 5.2.6, should also represent the production mean, and that the limits specified in the reproducibility test should also be applicable to the full sensitivity range anticipated during production.
5.1.7 Test schedule
The specimens shall be tested according to the following test schedule (see Table 1). After the reproducibility test, the four least sensitive specimens (i.e. those with the highest response value shall be numbered 22 to 25), and the others shall be numbered 1 to 21 arbitrarily.
5.2 Nominal activation conditions/sensitivity 5.2.1 Individual alarm indication
A visual inspection of a specimen shall be conducted to verify that the detector meets the requirements for individual alarm indication as specified in 4.2.1.
The specimen shall be checked for adequate visibility in an ambient light intensity of 500 lux.
5.2.2 Rate sensitive CO response
The behaviour of the CO fire detector to rate sensitive CO response shall be assessed to meet the requirements in 4.2.2 by analysis of the circuit/software, and/or by physical tests and simulations.
5.2.3 Response to slowly developing fires
The behaviour of the CO fire detector to slowly developing fires shall be assessed to meet the requirements of
4.2.3 by analysis of the circuit/software, and/or by physical tests and simulations.
5.2.4 Repeatability
5.2.4.1 Object of the test
To show that the detector has stable behaviour with respect to its sensitivity, even after a number of alarm conditions.
5.2.4.2 Test procedure
The response value of the specimen to be tested shall be measured as described in 5.1.5 six times.
The specimen’s orientation relative to the direction of airflow is arbitrary, but it shall be the same for all six measurements.
The maximum response value shall be designated Smax, the minimum value shall be designated Smin.
5.2.5 Directional dependence
5.2.5.1 Object of the test
To confirm that the sensitivity of the detector is not unduly dependent on the direction of airflow around the detector.
5.2.5.2 Test procedure
The response value of the specimen to be tested shall be measured eight times as described in 5.1.5, the specimen being rotated 45° about its vertical axis between each measurement, so that the measurements are taken for eight different orientations relative to the direction of air flow.
The maximum response value shall be designated Smax, the minimum value shall be designated Smin.
The orientations, for which the maximum and minimum response values were measured, shall be noted.
In the following tests the orientation for which the maximum response was measured is referred to as the least sensitive orientation, and the orientation for which the minimum response was measured is referred to as the most sensitive orientation.
5.2.6 Reproducibility
5.2.6.1 Object of the test
To show that the sensitivity of the detector does not vary unduly from specimen to specimen and to establish response value data for comparison with the response values measured after the environmental tests.
5.2.6.2 Test procedure
The response value of each of the test specimens shall be measured as described in 5.1.5.
The mean of these response values shall be calculated and shall be designated S .
The maximum response value shall be designated Smax and the minimum value shall be designated Smin.
5.2.7 Air movement
5.2.7.1 Object of the test
To show that the sensitivity of the detector is not unduly affected by the rate of the airflow.
5.3.1 Connection of ancillary devices
A visual inspection of a specimen shall be conducted to verify that the detector meets the requirements for connection of ancillary devices specified in 4.3.1.
5.3.2 Monitoring of detachable detectors
A visual inspection of a specimen shall be conducted to verify that the detector meets the requirements for monitoring of detachable devices specified in 4.3.2.
5.3.3 Manufacturer’s adjustments
A visual inspection of a specimen shall be conducted to verify that the detector meets the requirements for manufacturer’s adjustments specified in 4.3.3.
5.3.4 On-site adjustment of behaviour
A visual inspection of a specimen shall be conducted to verify that the detector meets the requirements for on- site adjustment of behaviour specified in 4.3.4.
5.3.5 Software controlled detectors
For detectors that rely on software for their operation, an assessment of the documentation provided by the manufacturer shall be conducted to verify that the device complies with the requirements specified in 4.3.5.
5.3.6 Long term stability 5.3.6.1 Object of the test
To confirm that the detectors are stable over long periods of time.
5.3.6.2 Test procedure
Throughout the duration of the test, the detector shall be connected to suitable supply and monitoring equipment and shall be placed in laboratory atmospheric conditions (see 5.1.1).
The response value shall be measured as described in 5.1.5, after 84 days from the start of the test.
The highest of the values measured in this test and that measured for the same detector in the reproducibility test shall be designated Smax. The lowest of the values measured in this test and that measured for the same detector in the reproducibility test shall be designated Smin.
5.4.1.1 Object of the test
To show that, within the specified range(s) of the supply parameters (e.g. voltage), the sensitivity of the detector is not unduly dependent on these parameters.
5.4.1.2 Test procedure
The response value of the specimen shall be measured as described in 5.1.5, at the upper and lower limits of the supply parameter (e.g. voltage) range(s) specified by the manufacturer.
The maximum response value shall be designated Smax and the minimum value shall be designated Smin.
For conventional detectors the supply parameter is the dc voltage applied to the detector. For other types of detector (e.g. analogue addressable) signal levels and timing may need to be considered. If necessary the manufacturer may be requested to provide suitable supply equipment to allow the supply parameters to be changed as required.
5.5 Performance parameters under fire conditions 5.5.1 Fire sensitivity
5.5.1.1 Object of the test
To show that the detector has adequate sensitivity to incipient type fires for application in fire detection systems for buildings.
5.5.1.2 Principle
The specimens are mounted in a standard fire test room and are exposed to a series of test fires designed to produce smoke and CO.
5.5.1.3 Test procedure
5.5.1.3.1 Fire test room
The fire sensitivity tests shall be conducted in a rectangular room with a flat horizontal ceiling, and the following dimensions:
The fire test room shall be equipped with the following measuring instruments arranged as indicated in Annex C:
5.5.1.3.2 Test Fires
The specimens shall be subjected to two test fires, TF2 and TF3 from EN 54-7 as amended by. The type, quantity and arrangement of the fuel and the method of ignition are described in Annex E and Annex F, along with the end of test condition and the required profile curve limits.
In order to be a valid test fire, the development of the fire shall be such that the profile curves of m against y, m against time, and S against time fall within the specified limits, up to the time when all of the specimens have generated an alarm signal or the end of test condition is reached, whichever is the earlier. If these conditions are not met then the test is invalid and shall be repeated. It is permissible, and may be necessary, to adjust the quantity, condition (e.g. moisture content) and arrangement of the fuel to obtain valid test fires.
5.5.1.3.3 Mounting of the specimens
The four specimens (Nos. 22, 23, 24 and 25) shall be mounted on the fire test room ceiling in the designated area (see Annex C). The specimens shall be mounted in accordance with the manufacturer’s instructions, such that specimens are in the least sensitive orientation for CO relative to an assumed airflow from the centre of the room to the specimen.
Each specimen shall be connected to its supply and monitoring equipment, as described in 5.1.2, and shall be allowed to stabilize in its quiescent condition before the start of each test fire.
Detectors which dynamically modify their sensitivity in response to varying ambient conditions may require special reset procedures and/or stabilization times. The manufacturer’s guidance should be sought in such cases to ensure that the state of the detectors at the start of each test is representative of their normal quiescent state.
5.5.1.3.4 Initial conditions
Before each test fire the room shall be ventilated with clean air until it is free from smoke and CO, and so that the conditions listed below can be obtained.
The ventilation system shall then be switched off and all doors, windows and other openings shall be closed. The air in the room shall then be allowed to stabilize, and the following conditions shall be obtained before the test is started:
(23 ± 5) °C; negligible; y < 0,05; m < 0,02 dB/m; S < 3 pi/1
air temperature T: air movement: smoke density (ionization): smoke density (optical): CO concentration
The stability of the air, and temperature gradients, affect the flow of smoke and CO within the room. This is particularly important for test fires TF2 and TF3 which produce low thermal lift for the smoke and CO. It is therefore recommended that the difference between the temperature near the floor and the ceiling is < 2 K, and that local heat sources that can cause convection currents (e.g. lights and heaters) should be avoided. If it is necessary for people to be in the room at the beginning of a test fire, they should leave as soon as possible, taking care to produce the minimum disturbance to the air.
5.5.1.3.5 Recording of the fire parameters and response values
5.6.1.1 Dry heat (operational)
5.6.1.1.1 Object of the test
To demonstrate the ability of the detector to function correctly at high ambient temperatures appropriate to the anticipated service environment.
5.6.1.1.2 Test procedure
The specimen to be tested shall be installed in the gas test chamber described in Annex A, in its least sensitive orientation, with an initial air temperature of (23 ± 5) °C, and shall be connected to its supply and monitoring equipment.
The gas test chamber shall be installed in a climatic chamber and the air temperature in the gas test chamber shall then be increased to (55 ± 2) °C, at a rate not exceeding 1 Kmin-1, and maintained at this temperature for 2 h.
The CO response value shall then be measured as described in 5.1.5 but with the temperature at (55 ± 2) °C.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated
5.6.1.2 Dry heat (endurance) 5.6.1.2.1 Object of the test
To demonstrate the ability of the detector to withstand the long term effects of high temperature in the service environment. (e.g. changes in electrical properties of materials, chemical reactions, etc.).
5.6.1.2.2 Test procedure
5.6.1.2.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-2. Tests for non-heat-dissipating specimens (i.e. Tests Ba or Bb in accordance with EN 60068-2-2:2007) will be applicable. Test Ba (with sudden changes in temperature) may be used, to improve test economy, if it is known that the sudden change in temperature will not be detrimental to the specimen.
5.6.1.2.2.2 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 but shall not be supplied with power during the conditioning.
5.6.1.2.2.3 Conditioning
5.6.1.2.2.4 Final measurements
After a recovery period, of between 1 h and 2 h in standard laboratory conditions, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated Smin.
5.6.1.2.3 Requirements
The detector shall be deemed to comply with the requirements of this sub-clause if:
5.6.1.3.1 Object of the test
To demonstrate the ability of the detector to function correctly at low ambient temperatures appropriate to the anticipated service environment.
5.6.1.3.2 Test procedure 5.6.1.3.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-1, Test Ab and as described below.
5.6.1.3.2.2 State of the specimen during conditioning
The specimen to be tested shall be installed in the gas test chamber described in Annex A, in its least sensitive orientation, with an initial air temperature of (23 ± 5) °C, and shall be connected to its supply and monitoring equipment.
The gas test chamber shall be installed in a climatic chamber and the air temperature in the gas test chamber shall then be decreased to (-10 ± 3) °C, at a rate not exceeding 1 Kmin-1, and maintained at this temperature for 16 h.
NOTE When decreasing the temperature in the climatic chamber, care needs to be taken to ensure that condensation does not occur on the detector.
5.6.1.3.2.3 Measurement during conditioning
The specimen under test shall be monitored for alarm or fault signals.
The CO response value shall then be measured as described in 5.1.5 but with the (-10 ± 3) °C.
The greater of the CO response value measured in this test and that measured for the same reproducibility test shall be designated Smax and the lesser shall be designated Smin.
5.6.2.1 Damp heat, cyclic (operational)
5.6.2.1.1 Object of the test
To demonstrate the ability of the detector to function correctly at high relative humidity, with condensation, that can occur for short periods in the anticipated service environment.
5.6.2.1.2 Test procedure
5.6.2.1.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-30, using the Variant 2 test cycle and controlled recovery conditions, and as described below.
5.6.2.1.2.2 State of the specimen during conditioning
temperature at specimen in the
The specimen to be tested shall be mounted as described in 5.1.3 and shall be connected to supply and monitoring equipment as described in 5.1.2.
5.6.2.1.2.3 Conditioning
The following severity of conditioning shall be applied:
lower temperature: upper temperature: relative humidity: 1) 2)
at lower temperature: at upper temperature: 2
5.6.2.1.2.4 Measurements during conditioning
The specimen shall be monitored during the conditioning period to detect any alarm or fault signals.
5.6.2.1.2.5 Final measurements
After a recovery period of at least 1 h at standard atmospheric conditions (5.1.1), the CO response value of the specimen shall be measured as described in 5.1.5.
The greater of the CO response values measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated Smin.
5.6.2.1.3 Requirements
The detector shall be deemed to comply with the requirements of this sub-clause if:
5.6.2.2.1 Object of the test
To demonstrate the ability of the detector to function correctly at high relative humidity (without condensation) that may occur for short periods in the service environment.
5.6.2.2.2 Test procedure
5.6.2.2.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-78, Test Cab and as described below.
5.6.2.2.2.2 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 and shall be connected to supply and monitoring equipment as described in 5.1.2.
5.6.2.2.2.3 Conditioning
The following conditioning shall be applied using a saturated solution of potassium sulphate to maintain the required relative humidity inside a sealed enclosure.
In order to minimize the risk of condensation, it is recommended that the test specimen is conditioned at 40 °C prior to being introduced in the gas test chamber.
5.6.2.2.2.4 Measurements during conditioning
The specimen shall be monitored during the conditioning period to detect any alarm or fault signals.
During the last hour of the conditioning period, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated Object of the test
To demonstrate the ability of the detector to withstand the long term effects of humidity in the service environment. (e.g. changes in electrical properties of materials, chemical reactions involving moisture, galvanic corrosion, dilution and expansion of cell electrolyte etc.)
5.6.2.3.1 Test procedure 5.6.2.3.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-78, Test Cab, and as described below.
5.6.2.3.2.2 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 but shall not be supplied with power during the conditioning.
5.6.2.3.2.3 Final measurements
After a recovery period, of between 1 h and 2 h in standard laboratory conditions, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test, shall be designated Smax, and the lesser shall be designated Object of the test
To demonstrate the ability of the detector to function correctly at low relative humidity that may occur for long periods in the service environment.
5.6.2.4.1 Test procedure
5.6.2.4.2.1 State of the specimen during conditioning
The specimen shall be mounted in the gas test chamber as described in 5.1.3 and shall be connected to supply and monitoring equipment as described in 5.1.2.
5.6.2.4.2.2 Measurements during conditioning
The specimen shall be monitored during the conditioning period to detect any alarm or fault signals.
During the last hour of the conditioning period, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured during conditioning in this test and that measured for the same specimen in the reproducibility test, shall be designated S1max and the lesser shall be designated S1min.
5.6.2.4.2.3 Final measurements
After a recovery period, of between 1 h and 2 h in standard laboratory conditions, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured after the recovery period in this test and that measured for the same specimen in the reproducibility test, shall be designated S2max, and the lesser shall be designated
- a) no false operations, including alarm or fault signals, have occurred during the transition to the conditioning temperature or during the period at the conditioning temperature until the CO response value is measured; and
5.6.3.1 Object of the test
To demonstrate the ability of the detector to withstand the corrosive effects of sulphur dioxide that may occur for long periods in the service environment.
5.6.3.2 Test procedure
5.6.3.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-42, Test Kc, except that the conditioning shall be as described below.
5.6.3.2.2 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3. It shall not be supplied with power during the conditioning, but, unless it is radio-linked, it shall have untinned copper wires, of the appropriate diameter, connected to sufficient terminals, to allow the final measurement to be made, without making further connections to the specimen.
5.6.3.2.4 Final measurements
Immediately after the conditioning, the specimen shall be subjected to a drying period of 16 h at (40 ± 2) °C, < 50 % RH, followed by a recovery period of at least 1 h at the standard laboratory conditions. After this, the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated
5.6.4.1 Shock (operational)
5.6.4.1.1 Object of the test
To demonstrate the immunity of the detector to mechanical shocks, that are likely to occur, albeit infrequently, in the anticipated service environment.
5.6.4.1.2 Test procedure
5.6.4.1.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-27, Test Ea, for a half sine wave pulse, but with the peak acceleration related to specimen mass as indicated below.
5.6.4.1.2.2 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 to a rigid fixture, and shall be connected to its supply and monitoring equipment as described in 5.1.2.
5.6.4.1.2.3 Conditioning
5.6.4.1.2.4 Measurements during conditioning
The specimen shall be monitored during the conditioning period and for a further 2 min to detect any alarm or fault signals.
5.6.4.1.2.5 Final measurements
After the conditioning the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated Object of the test
To demonstrate the immunity of the detector to mechanical impacts upon its surface, which it may sustain in the normal service environment, and which it can reasonably be expected to withstand.
5.6.4.2.1 Test procedure
5.6.4.2.2.1 Apparatus
The test apparatus shall consist of a swinging hammer incorporating a rectangular section aluminium alloy head (Aluminium alloy Al Cu4 Si Mg complying with ISO 209, solution treated and precipitation treated condition) with the plane impact face chamfered to an angle of 60° to the horizontal, when in the striking position (i.e. when the hammer shaft is vertical). The hammer head shall be (50 ± 2,5) mm high, (76 ± 3,8) mm wide and (80 ± 4) mm long at mid height as shown in Figure H.1. A suitable apparatus is described in Annex H.
5.6.4.2.2.2 State of the specimen during conditioning
The specimen shall be rigidly mounted to the apparatus by its normal mounting means and shall be positioned so that it is struck by the upper half of the impact face when the hammer is in the vertical position (i.e. when the hammerhead is moving horizontally). The azimuthal direction and position of impact, relative to the specimen shall be chosen as that most likely to impair the normal functioning of the specimen.
The specimen shall be connected to its supply and monitoring equipment as described in 5.1.2.
5.6.4.2.2.3 Measurements during conditioning
The specimen shall be monitored during the conditioning period and for a further 2 min to detect any alarm or fault signals.
5.6.4.2.2.4 Final measurements
After the conditioning the CO response value shall be measured as described in 5.1.5.
5.6.4.3.1 Object of the test
To demonstrate the immunity of the detector to vibration at levels considered appropriate to the normal service environment.
5.6.4.3.2 Test procedure
5.6.4.3.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-6, Test Fc, and as described below.
5.6.4.3.2.2 State of the specimen during conditioning
The specimen shall be mounted on a rigid fixture as described in 5.1.3 and shall be connected to its supply and monitoring equipment as described in 5.1.2. The vibration shall be applied in each of three mutually perpendicular axes, in turn. The specimen shall be mounted so that one of the three axes is perpendicular to its normal mounting plane.
The vibration operational and endurance tests may be combined such that the specimen is subjected to the operational test conditioning followed by the endurance test conditioning in one axis before changing to the next axis. Only one final measurement needs to be made.
5.6.4.3.2.4 Measurements during conditioning
The specimen shall be monitored during the conditioning period to detect any alarm or fault signals.
5.6.4.3.2.5 Final measurements
The final measurements, as specified in 5.1.5, are normally made after the vibration endurance test and only need be made here if the operational test is conducted in isolation.
5.6.4.3.3 Requirements
The detector shall be deemed to comply with the requirements of this sub-clause if:
5.6.4.4.1 Object of the test
To demonstrate the ability of the detector to withstand the long term effects of vibration at levels appropriate to the service environment.
5.6.4.4.2 Test procedure
5.6.4.4.2.1 Reference
The test apparatus and procedure shall be as described in EN 60068-2-6, Test Fc, and as described below.
5.6.4.4.2.2 State of the specimen during conditioning
frequency range: acceleration amplitude: number of axes: sweep rate:
5.6.4.3.2.3 Conditioning
The following conditioning shall be applied:
The specimen shall be mounted on a rigid fixture as described in 5.1.3, but shall not be supplied with power during conditioning. The vibration shall be applied in each of three mutually perpendicular axes, in turn. The specimen shall be mounted so that one of the three axes is perpendicular to its normal mounting axis.
5.6.4.4.2.4 Final measurements
After the conditioning the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test, shall be designated Smax, and the lesser shall be designated
5.6.5.1 EMC, immunity (operational)
5.6.5.1.1 Object of the tests
To demonstrate the immunity of the detector to operate correctly when submitted to electromagnetic interference.
5.6.5.1.2 Test procedure 5.6.5.1.2.1 Reference
EMC, immunity tests shall be carried out as described in EN 50130-4. The following tests shall be conducted:
5.6.5.1.3 Measurements during conditioning
During the conditioning, the specimen shall be monitored to detect for any false operation or fault signals when in the quiescent state.
5.6.5.1.4 Final measurements
After the conditioning the CO response value shall be measured as described in 5.1.5.
The greater of the CO response value measured in this test and that measured for the same specimen in the reproducibility test, shall be designated Smax, and the lesser shall be designated Smin.
5.6.5.2 Test requirements
The specimen shall be deemed to comply with the requirements of this test if the tests criteria for compliance specified in EN 50130-4 and the following are met:
5.6.6.1.1 Object of the test
To demonstrate the ability of the CO fire detector to withstand exposure to high levels of CO that may be encountered during a fire condition.
5.6.6.1.2 Test procedure
5.6.6.1.2.1 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 and shall be connected to supply and monitoring equipment as described in 5.1.2.
5.6.6.1.2.2 Conditioning
The specimen shall be subjected to an atmosphere containing (1 000 ± 100) pl/l carbon monoxide for a period of 1 h.
5.6.6.1.2.3 Measurement during conditioning
The specimen shall be monitored to detect any alarm or fault signals.
During the last 5 min of the conditioning the specimen shall be reset in accordance with the manufacturer’s instructions.
5.6.6.1.2.4 Final measurements
After a recovery period of 1 h at the standard laboratory conditions the specimen shall be reset in accordance with the manufacturer’s instructions. Unless the detector is an alarm or fault condition, the response value shall be measured as described in 5.1.5.
The greater the response value measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated Smin.
5.6.6.1.3 Requirements
The specimen shall be deemed to comply with the requirement of this test if:
5.6.6.2 Exposure to chemical agents at environmental concentrations
5.6.6.2.1 Object the tests
To demonstrate the ability of the detector to withstand the effects of exposure to atmospheric pollutants or chemicals that may be encountered in the service environment.
5.6.6.2.2 Test procedure
5.6.6.2.2.1 State of the specimen during conditioning
The specimen shall be mounted as described in 5.1.3 and shall be connected to supply and monitoring equipment as described in 5.1.2.
5.6.6.2.2.2 Conditioning
The specimen shall be subjected to each of the chemical exposures specified in Table 2.
5.6.6.2.2.3 Measurements during conditioning
The specimen shall be monitored during each of the conditioning periods to detect any alarm or fault signals.
5.6.6.2.2.4 Final measurements
After the recovery period specified in Table 2 at standard atmospheric conditions (5.1.1), the CO response value of the specimen shall be measured as described in 5.1.5.
The greater of the CO response values measured in this test and that measured for the same specimen in the reproducibility test shall be designated Smax and the lesser shall be designated
6.1 General
The compliance of the point carbon monoxide detector with the requirements of this European Standard and with the performances declared by the manufacturer in the DoP shall be demonstrated by:
The manufacturer shall always retain the overall control and shall have the necessary means to take responsibility for the conformity with its declared performance(s).
6.2 Type testing 6.2.1 General
All performances related to characteristics included in this standard shall be determined when the manufacturer intends to declare the respective performances unless the standard gives provisions for
declaring them without performing tests. (e.g. use of previously existing data, CWFT and conventionally accepted performance).
Assessment previously performed in accordance with the provisions of this standard, may be taken into account provided that they were made to the same or a more rigorous test method, under the same AVCP system on the same product or products of similar design, construction and functionality, such that the results are applicable to the product in question.
NOTE Same AVCP system means testing by an independent third party under the responsibility of a notified product certification body.
For the purpose of assessment manufacturer’s products may be grouped into families where it is considered that the results for one or more characteristics from any one product within the family are representative for that same characteristics for all products within that same family.
Products may be grouped in different families for different characteristics.
Reference to the assessment method standards should be made to allow the selection of a suitable representative sample.
In addition, the determination of the product type shall be performed for all characteristics included in the standard for which the manufacturer declares the performance:
Where components are used whose characteristics have already been determined, by the component manufacturer, on the basis of assessment methods of other product standards, these characteristics need not be re-assessed. The specifications of these components shall be documented.
Products bearing regulatory marking in accordance with appropriate harmonized European specifications may be presumed to have the performances declared in the DoP, although this does not replace the responsibility on the manufacturer to ensure that the point carbon monoxide detector as a whole is correctly manufactured and its component products have the declared performance values.
6.2.2 Test samples, testing and compliance criteria
The number of samples of point carbon monoxide detectors to be tested/assessed shall be in accordance with Table 3.
—
— identify procedures to correct instances of non-constancy.
The manufacturer shall draw up and keep up-to-date documents defining the FPC. The manufacturer’s documentation and procedures should be appropriate to the product and manufacturing process and the FPC system should achieve an appropriate level of confidence in the constancy of performance of the product. This involves:
- a) the preparation of documented procedures and instructions relating to factory production control operations, in accordance with the requirements of the technical specification to which reference is made;
- b) the effective implementation of these procedures and instructions;
- c) the recording of these operations and their results;
- d) the use of these results to correct any deviations, repair the effects of such deviations, treat any resulting instances of non-conformity and, if necessary, revise the FPC to rectify the cause of non-constancy of performance.
Where subcontracting takes place, the manufacturer shall retain the overall control of the product and ensure that he receives all the information that is necessary to fulfil his responsibilities according to this European Standard.
If the manufacturer has part of the product designed, manufactured, assembled, packed, processed and/or labelled by subcontracting, the FPC of the subcontractor may be taken into account, where appropriate for the product in question.
The manufacturer who subcontracts all of his activities may in no circumstances pass these responsibilities on to a subcontractor.
NOTE Manufacturers having an FPC system, which complies with EN ISO 9001 and which addresses the provisions of the present European Standard are considered as satisfying the FPC requirements of the Regulation (EU) No 305/2011.
6.3.2.2 Equipment
6.3.2.2.1 Testing
All weighing, measuring and testing equipment shall be calibrated or verified or both and regularly inspected according to documented procedures, frequencies and criteria to ensure consistency with the monitoring and measuring requirements. All calibrated or verified equipment shall have identification in order to determine their status.
6.3.2.2.2 Manufacturing
All equipment used in the manufacturing process shall be regularly inspected and maintained to ensure use, wear or failure does not cause inconsistency in the manufacturing process. Inspections and maintenance shall be carried out and recorded in accordance with the manufacturer’s written procedures and the records retained for the period defined in the manufacturer’s FPC procedures.
6.3.2.3 Raw materials and components
The specifications of all incoming raw materials and components shall be documented, as shall the inspection scheme for ensuring their compliance. In case supplied kit components are used, the constancy of performance system of the component shall be that given in the appropriate harmonized technical specification for that component.
6.3.2.4 Traceability and marking
Individual point carbon monoxide detectors shall be identifiable and traceable with regard to their production origin. The manufacturer shall have written procedures ensuring that processes related to affixing traceability codes and/or markings are inspected regularly.
6.3.2.5 Controls during manufacturing process
The manufacturer shall plan and carry out production under controlled conditions.
6.3.2.6 Product testing and evaluation
The manufacturer shall establish procedures to ensure that the declared performance of the characteristics is maintained. The characteristics, and the means of control, are indicated in Clause 4 and Clause 5.
6.3.2.7 Non-complying products
The manufacturer shall have written procedures which specify how non complying products shall be dealt with. Any such events shall be recorded as they occur and these records shall be kept for the period defined in the manufacturer’s written procedures.
Where the product fails to satisfy the acceptance criteria, the provisions for non-complying products shall apply, the necessary corrective action(s) shall immediately be taken and the products or batches not complying shall be isolated and properly identified.
Once the fault has been corrected, the test or verification in question shall be repeated.
The results of controls and tests shall be recorded. The product description, date of manufacture, test method adopted, test results and acceptance criteria shall be entered in the records under the signature of the person responsible for the control/test.
With regard to any control result not meeting the requirements of this European Standard, the corrective measures taken to rectify the situation (e.g. a further test carried out, modification of manufacturing process, throwing away or putting right of product) shall be indicated in the records.
6.3.2.8 Corrective action
The manufacturer shall have documented procedures that instigate action to eliminate the cause of non¬conformities in order to prevent recurrence.
6.3.2.9 Handling, storage and packaging
The manufacturer shall have procedures providing methods of product handling and shall provide suitable storage areas preventing damage or deterioration.
6.3.3 Product specific requirements
All assessments and their results shall be documented in the initial inspection report.
6.3.4 Continuous surveillance of FPC Surveillance of the FPC shall be undertaken once a year.
The surveillance of the FPC shall include a review of the FPC test plan(s) and production processes(s) for each product to determine if any changes have been made since the last assessment or surveillance. The significance of any changes shall be assessed.
Checks shall be made to ensure that the test plans are still correctly implemented and that the production equipment is still correctly maintained and calibrated at appropriate time intervals.
The records of tests and measurement made during the production process and to finished products shall be reviewed to ensure that the values obtained still correspond with those values for the samples submitted to the determination of the product type and that the correct actions have been taken for non-compliant products.
6.3.5 Procedure for modifications
If modifications are made to the product, production process or FPC system that could affect any of the product characteristics declared according to this standard, then all characteristics for which the manufacturer declares performance, which may be affected by the modification, shall be subject to the determination of the product type as described in 6.2.1.
Where relevant, a re-assessment of the factory and of the FPC system shall be performed for those aspects, which may be affected by the modification.
All assessments and their results shall be documented in a report.
6.3.6 One-off products, pre-production products, (e.g. prototypes) and products produced in very low quantities
The point carbon monoxide detectors produced as a one-off, prototypes assessed before full production is established and products produced in very low quantities (less than 50 per year) are assessed as follows:
7 Classification
No classification of point carbon monoxide detectors is specified in this European Standard.
8 Marking, labelling and packaging
Each point carbon monoxide detector shall be marked with the following information:
The point carbon monoxide detector shall either be supplied with sufficient data to enable their correct operation or, if all of these data are not supplied with each point carbon monoxide detector, reference to the appropriate data sheet(s) or technical manual shall be given on, or with each point carbon monoxide detector. This shall include reference to any setting(s) at which the manufacturer does not claim compliance with this standard.
Gas test chamber for response value and cross-sensitivity
A.1 General
This Annex A specifies those properties of the gas test chamber that are of primary importance for making repeatable and reproducible measurements of CO response values (see 5.1.5). However, since it is not practical to specify and measure all parameters which may influence the measurements, the background information in Annex F should be carefully considered and taken into account when a gas test chamber is designed and used to make measurements in accordance with this standard.
A.2 Gas test chamber specification
A.2.1 The gas chamber shall be gas-tight, closed-loop and re-circulating. It shall be large enough to fully enclose the detector to be tested and the sensing parts of the measuring equipment. The information in Annex G should be carefully considered and taken into account when a gas test chamber is designed and used to make measurements in accordance with this standard.
A.2.2 Means shall be provided for creating an essentially laminar air flow at the required velocities (i.e. (0,2 ± 0,04) m/s or (1,0 ± 0,2) m/s) where the detector to be tested will be mounted. The detector to be tested shall be mounted to be at least 20 mm from the side of the gas test chamber.
A.2.3 It shall be possible to control the temperature inside the box, in the proximity of the specimen under test, at the required values and to increase the temperature at a rate not exceeding 1 K/min from -10 °C to +55 °C.
A.2.4 The response value of CO fire detectors is characterized by the concentration of CO in air measured in the proximity of the detector, at the moment that it generates an alarm signal. Gas concentration measurements, S, shall be made in the proximity of the detector.
A.2.5 The CO concentration measuring instrument shall have a measuring accuracy of at least 1 pl/l or 5 % of the measured value whichever is greater. The response time of the instrument shall be such that it does not cause a measurement error at the highest rate of increase used for measurements greater than 5 pl/l. The CO measuring instrument shall not be adversely affected by other gases that will be introduced during the tests.
A.2.6 Means shall be provided for the introduction of the test gas such that a homogeneous gas concentration and for a linear rate of increase of concentration is obtained at the lowest and highest ramps used (1 pl/l per minute and 6 pl/l per minute).
A.2.7 Means shall be provided to maintain the pressure inside the chamber close to atmospheric pressure to prevent pressure variations caused by the introduction of CO or other gases. Means shall also be provided to purge the gas test chamber after each test with clean air.
Use and release of gases in the environment should be according to local health and safety regulations.
A.2.8 Means shall be provided for generating humid atmosphere inside the gas test chamber in the range (11 ± 2) % and (96,5 ± 0,5) %.
A.2.9 Only one detector shall be mounted in the gas test chamber, unless it has been demonstrated that measurements made simultaneously on more than one detector are in close agreement with measurements
made by testing detectors individually. In the event of a dispute the value obtained by individual testing shall be accepted.
CO and smoke measuring instruments
B.1 General
This annex specifies the instruments used for recording the fire parameters and response values during the Test Fires (see 5.5.1).
B.2 CO measuring instrument
The response value of CO fire detectors is characterized by the concentration of CO in air measured in the proximity of the detector, at the moment that it generates an alarm signal.
The instrument used for the measurement of CO in the gas test chamber shall have a measurement error not exceeding 1^l/l or 5 % of the measured value, whichever is greater. The 90 % response time of the instrument (T90) shall not exceed 10 s.
The response time of the instrument shall be such that it does not cause a measurement error at the highest rate of increase used for measurements greater than 5 ^l/l. The CO measuring instrument shall not be adversely affected by other gases that will be introduced during the tests.
Care shall be taken to ensure that the CO measuring instrument used in the fire test room does not respond to fire products other than CO in such a way as to affect the accuracy of the CO measurements.
B.3 Obscuration meter
The obscuration meter shall have characteristics as defined in EN 54-7:2000 , Annex C. B.4 Measuring ionization chamber (MIC)
The MIC shall be constructed and have characteristics as defined in EN 54-7:2000 , Annex C.
Fire test room
C.1 General
This annex specifies the parameters of the room used for conducting the Test Fires when verifying the fire sensitivity of the detectors (see 5.5.1). The fire test room is as specified in EN 54-7:2000, Annex F.
C.2 Fire test room specification
C.2.1 The specimens to be tested, the MIC, the temperature probe, the measuring part of the obscuration meter, and the CO measuring instrument, shall all be located within the volume shown in Figure C.1 and Figure C.2.
C.2.2 The specimens, the MIC, the mechanical parts of the obscuration meter and the CO measuring instrument shall be at least 100 mm apart, measured to the nearest edges. The centre line of the beam of the obscuration meter shall be at least 35 mm below the ceiling.