ISO 7240:2011 pdf free download – Fire detection and alarm systems一 Part 11: Manual call points.
5.7.2.4.1 Monitor the specimen during the conditioning period to detect any alarm or fault signals.
5.7.2.4.2 During the last half hour of the conditioning period, perform the function test of 5.3.
5.7.2.5 Final measurements
5.7.2.5.1 After a recovery period of at least 1 h at standard atmospheric conditions in accordance with 5.1.1, reset the specimen and then test the specimen as described in the operational performance test of 5.2.
5.7.2.5.2 The dry heat operational and endurance tests may be combined such that the specimen for outdoor use is subjected to the operational test conditioning followed (after resetting) by the endurance test conditioning. Only one final measurement shall be made.
5.7.3 Requirements
5.7.3.1 No alarm or fault signal shall be given during the conditioning period, except as required in the test of 5.7.2.4.
5.7.3.2 In the test of 5.7.2.4.2, the specimen shall comply with the requirements of 5.3.3.
5.7.3.3 In the test of 5.7.2.5, the specimen shall comply with the requirements of 5.2.3.
5.8 Dry heat (endurance)
5.8.1 Object of test
The object of the test is to demonstrate the ability of the device to withstand long-term ageing effects.
5.8.2 Test procedure
5.8.2.1 Reference
The test apparatus and the test procedure shall be in accordance with IEC 60068-2-2, test Bb and with 5.8.2.2 to 5.8.2.4.
5.8.2.2 State of the specimen during conditioning
Mount the specimen in accordance with 5.1 .3. Do not supply power during the conditioning.
5.8.2.3 Conditioning
Apply the appropriate test conditions in Table 3.
5.12.2.4 Final measurements
After a recovery period of at least 1 h at standard atmospheric conditions in accordance with 5.1.1, test the
specimen as described in the reliability test of 5.5.
5.12.3 Requirements
5.12.3.1 No fault signal attributable to the endurance conditioning shall be given on connection of the specimen.
5.12.3.2 In the test of 5.12.2.4, the specimen shall comply with the requirements of 5.5.3.
5.13 SO2 corrosion (endurance)
5.13.1 Object of test
The object of the test is to demonstrate the ability of the device to withstand the corrosive effects of sulfur
dioxide as an atmospheric pollutant.
5.13.2 Test procedure
5.13.2.1 Reference
The test apparatus and the test procedure shall be in accordance with IEC 60068-2-42, test Kc, except for the relative humidity of the test atmosphere, which shall be (93 ± 3) % instead of (75 ± 5) %, and with 5.13.2.2 to 5.13.2.4.
5.13.2.2 State of the specimen during conditioning
Mount the specimen in accordance with 5.1.3. Do not supply the specimen with power, but connect untinned copper wires of the appropriate diameter to the terminals to allow the final measurements to be made without making further connections to the specimen.
5.13.2.4.2 After the recovery period, test the specimen as described in the operational performance test of 5.2.
5.13.3 Requirements
5.13.3.1 No fault signal attributable to the endurance conditioning shall be given on connection of the specimen.
5.13.3.2 In the test of 5.13.2.4, the specimen shall comply with the requirements of 5.2.3.
5.14 Shock (operational)
5.14.1 Object of test
The object of the test is to demonstrate the immunity of the device to mechanical shocks, which are likely to infrequently occur in the anticipated service environment.
5.14.2 Test procedure
5.14.2.1 Reference
The test apparatus and the test procedure shall be in accordance with IEC 60068-2-27, test Ea, for a half sine wave pulse, but with the peak acceleration related to the specimen mass as indicated in Table 9, and with 5.14.2.2 to 5.14.2.5.