BS/EN 54-5-2017 pdf download

07-26-2021 comment

BS/EN 54-5-2017 pdf download.Fire detection and fire alarm systems Part 5 : Heat detectors – Point heat detectors.
4.6.4.2 Impact (operational)
The point heat detector shall withstand mechanical impacts upon its surface, which it may sustain in the normal service environment, and which it can reasonably be expected to withstand. To confirm this, the point heat detector shall be tested in accordance with 5.6.4.2.
4.6.4.3 Vibration, sinusoidal, (operational)
The point heat detector shall withstand vibration at levels considered appropriate to the normal service environment. To confirm this, the point heat detector shall be tested in accordance with
5.6.4.3.
4.6.4.4 Vibration, sinusoidal (endurance)
The point heat detector shall withstand the long term effects of vibration at levels appropriate to the service environment. To confirm this, the point heat detector shall be tested In accordance with 5.6.4.4.
4.6.5 Electrical stability: Electromagnetic Compatibility (EMC), Immunity tests (operational)
The paint heat detector shall be immune to Electromagnetic Influences. To confirm this, the point heat detector shall be tested in accordance with 5.6.5.1.
5 Testing, assessment and sampling 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 60068-1:1994 as follows:
temperature: (15 to 35) °C;
relative humidity: (25 to 75) %;
air pressure: (86 to 106) kPa.
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.
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 speofled 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 point heat 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 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.
5.1.4 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 parts of EN 60068).
If a requirement or test procedure does not specify a tolerance or deviation limits, then deviation limits oft 5 % shall be applied.
5.1.5 Measurement of response time
The specimen, for which the response time is to be measured, shall be mounted in a heat tunnel as described in 5.1.3 and Annex A. It shall be connected to suitable supply and monitoring equipment in accordance with 5.1.2. The orientation of the specimen, relative to the direction of airflow, shall be that which gave the maximum response time in the directional dependence test 5.3.1, unless otherwise specified.
Before the measurement, the temperature of the air stream and the specimen shall be stabilized to the temperature specified in the applicable test procedure. The measurement is then made by increasing the air temperature, in the heat tunnel, linearly with respect to time, at the rate of rise specified in the applicable test procedure until the supply and monitoring equipment indicates an alarm or until the upper limit of response time for the test is exceeded.BS/EN 54-5-2017 pdf download.

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