BS EN 50130-5:2011 pdf download – Alarm systems – Part 5: Environmental test methods
the state of the specimen required during the conditioning (e.g. the configuration and operating
conditions);
any monitoring of the specimen and any measurements or inspections to be made during theconditioning (e.g. a functional test, where possible);
any final measurements or inspections to be made after the conditioning (e.g. a functional testand a visual inspection) and any special recovery conditions required before thesemeasurements;
h)the pass/fail criteria;
i)the test schedule, which gives the allocation of specimens to each test.
The following points should be taken into account during the drafting of the product standard makingreference to this standard:
the information, a) to h) above, may differ from test to test or between types of tests (e.g. betweenOperational & Endurance tests);
– for some types of equipment, it may not be possible to make the usual functional test during the
conditioning of some of the tests, due to limitations imposed on the equipment (e.g. being placedinside an environmental chamber). It may therefore be necessary to conduct a reduced functionaltest or to omit the functional test during conditioning. In other tests, it is not possible to do afunctional test during conditioning, due to the transitory or changing nature of the conditioning;
– the product standards should indicate whether any memory back up batteries should remain
connected during endurance tests,and if so whether the memory contents should be retained.
Dry heat (operational)
8.1 Object of the test
The object of the test is to demonstrate the ability of the equipment to function correctly at highambient temperatures, which may occur for short periods in the anticipated service environment.
8.2Principle
The test consists of exposing the specimen to the high temperature for sufficient time to allowtemperature stability to be reached, and for functional tests andior monitoring to be conducted. ‘Freeair conditions are simulated for heat dissipating specimens to allow for self heating effects.
8.3Test procedure
8.3.1 General
The test apparatus and procedure shall generally be as described in EN 60068-2-2:2007.
The tests with gradual changes in temperature shall be used.Test Bd shall be used for heatdissipating specimens (as defined in EN 60068-2-2) and test Bb shall be used for non heat dissipatingspecimens.
The dry heat operational test may be combined with the dry heat endurance test by omitting therecovery and the functional test in between.
8.3.2 Initial measurements
Before the conditioning, subject the specimen to the initial measurements required by the product standard.
8.3.3 State of specimen during conditioning
Mount the specimen and place it in the configuration and operating condition, as specified in the product standard.
8.3.4 Conditioning
Apply the appropriate severity of conditioning shown in Table 1.
8.3.5 Measurements during conditioning Monitor the specimen during the conditioning period to detect any change in status. Any further measurements, which the product standard requires to be made during the conditioning, shall be made during the last half hour of the conditioning period.
8.3.6 Final measurements After a recovery period of at least 1 h at standard laboratory conditions, subject the specimen to the final measurements required by the product standard.
9 Dry heat (endurance)
9.1 Object of the test The object of the test is to demonstrate the ability of the equipment to withstand long term ageing effects.
9.2 Principle The test consists of exposing the specimen to the high temperature for a long period to accelerate ageing effects.
9.3 Test procedure
9.3.1 General
The test apparatus and procedure shall generally be as described in EN 60068-2-2:2007.
Use test Bb for non heat dissipating specimen.
The dry heat endurance test may be combined with the dry heat operational test by omitting the recovery and the functional test in between.
9.3.2 Initial measurements
Before the conditioning, subject the specimen to the initial measurements required by the product standard.
9.3.3 State of specimen during conditioning
Mount the specimen as specified in the product standard. The specimen shall not be supplied with power during the conditioning.
9.3.4 Conditioning
Apply the appropriate severity of conditioning shown in Table 2.