Abstract： IEC 62599-1:2010 pdf free download.Alarm systems - Part 1: Environmental test methods. 8 Dry heat (operational) 8.1 Object of the test To demonstrate the ability of the equipment to function correctly at high ambient temperatures, which may...

IEC 62599-1:2010 pdf free download.Alarm systems - Part 1: Environmental test methods.

8 Dry heat (operational)

8.1 Object of the test

To demonstrate the ability of the equipment to function correctly at high ambient temperatures, which may occur for short penods in the anticipated service environment.

8.2 Principle

The test consists of exposing the specimen to the high temperature for sufficient time to allow temperature stability to be

reached, and for functional tests andlor monitoring to be conducted. ‘Free air’ conditions are simulated for heat dissipating

specimens to allow for sell-heating effects.

8.3 Test procedure

8.3.1 G.neral

The test apparatus and procedure shall generally be as described in IEC 60068-2-2:2007.

The tests with gradual changes in temperature shall be used. Test Sd shall be used for heat dissipating specimens (as defined In

IEC 60068-2-2) and test Sb shall be used for non heat dissipating specimens.

The dry heat operational lest may be combined with the dry heat endurance test by omitting the recovery and the functional test in between.

8.3.2 Initial measurements

Before conditioning, subject the specimen to the initial measurements required by the product standard.

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