EN 54-10-2002 pdf download.Fire detection and fire alarm systems – Part 10 : Flame detectors Point detectors.
5 Tests
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 lEG 60068-1 as
follows:
a) temperature : (15to35)°C
b) relative humidity : (25 to 75) %
C) air pressure : (86 to 106) kPa
NOTE 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 pail of one test on one specimen.
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 recognised.
Unless otherwise specified in the test method, detectors having adjustable sensitivity shall be set to their highest sensitivity for the conditioning.
NOTE The details of the supply and monitoring equment and the alarm critena used should be given in the test report.
5.1.3 Mounting arrangements
The specimen shall be mounted by its normal means of attachment in accordance with the manufacturer’s instructions. If these instructions describe more than one method of mounting then the method considered to be most unfavourable shall be chosen for each test.
5.1.5.2 Test apparatus
The test apparatus shall be as described in annex A.
The design and construction of the apparatus, and the surfaces surrounding the test area, shall be such that no significant radiation from the source reaches the detector apart from that which has passed through the aperture. (This means for example that there shall be no reflection of radiation from the walls or other parts of the apparatus, and no spurious radiation from hot flue gases or hot surfaces around the burner.)
Throughout this test method it is necessary to align the detector relative to its optical axis and to measure distances relative to the plane of the detector sensing element(s). If the detector does not have a well- defined optical axis then the manufacturer shall nominate an optical axis for the purposes of this test method. The position of this axis relative to an easily identifiable plane on the detector shall be noted In the test report.
Similarly. if the detector sensing elements do not lie in a well•defined plane then the manufacturer shall nominate a plane for the purposes of this test method. The position of this plane relative to an easily identifiable plane on the detector shall be noted in the test report.
5.1.5.3 InitIal determination
A suitable area for the aperture shall be determined experimentally before the commencement of the test programme such that the response point of one detector, chosen at random from the specimens submitted for test, lies within the range 1300 mm to 1700 mm. The size and shape of the aperture used shall be recorded and shall be kept constant throughout the test programme. For detectors having adjustable sensitivity, and whose adjustment range covers more than one sensitivity class, it will be necessary to determine an appropriate aperture size for each sensitivity class of the detector.
5.1.5.4 Source stability
After determining a suitable aperture size, and before any determination of response points, the irradiance on the optical axis of the source shall be measured using the radiometer in accordance with A.5. This measurement shall be carried out with no modulation of the source and with the aperture unobstructed. The measured value of irradiance shall be recorded and used as a reference throughout the test programme to verity that the source radiance has not varied by more than 5 %.
5.1.6 Test procedure
The specimen shall be connected to its supply and indicating equipment and shall be allowed to stabilize for a period 0115 mm or for a time specified by the manufacturer. During this stabilization period the specimen shall be shielded. using the shutter in accordance with A.3, from all sources of radiation which may affect the determination of the response point.EN 54-10-2002 pdf download.