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Within 30 min after the end of the recovery period, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the ability of the equipment to function correctly at high relative humidities (without condensation) which may occur for short periods in the service environment.

Testing shall be carried out in accordance with the procedures of EN 60068-2-78 with the modifications and additions given in 12.5.2.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2, be connected as required by 11.3 and be operating.

Apply the following severity of conditioning:

• temperature :40 °С ± 2 °С;

• relative humidity : (93 1*)% ;

• duration : 4 days.

Precondition the specimen by raising the temperature slowly from ambient to the conditioning temperature (40 ± 2) °С and hold until temperature stability has been reached before raising the relative humidity, to prevent the formation of water droplets on the specimen.

For electrical p.s.e., monitor the specimen during the conditioning period to check that the output voltage is within the manufacturer’s specified limits. During the last hour of the conditioning period, subject the specimen to the reduced functional test.

For pneumatic p.s.e. monitor the specimen during the conditioning period to check that the available pressure is within the manufacturer’s specified limits. During the last hour of the conditioning period, for a compressor set only, discharge the air receiver and check that the receiver is refilled to operating pressure within 60 min.

Within 30 min after the end of the recovery period, subject the specimen to the functional test and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the immunity of the equipment to mechanical impacts upon the surface, which it may sustain in the normal service environment and which it can reasonably be expected to withstand.

Testing shall be carried out using test apparatus and procedure in accordance with EN 60068-2-75, Test Ehb with the modifications and additions given in 12.6.2.4.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2, be connected as required by 11.3 and be operating.

Apply impacts to all external surfaces of the specimen.

For all such surfaces three blows shall be applied to any point(s) considered likely to cause damage to or impair the operation of the specimen.

Care shall be taken to ensure that the results from a series of three blows do not influence subsequent series.

Apply the following severity of conditioning:

• impact energy : (0,5 ± 0,04) J;

• number of impacts per point : 3.

Monitor the specimen during the conditioning period to check that the outputs are within the manufacturer’s specified limits and ensure that results of three blows do not influence subsequent series.

Within 30 min after the end of the recovery period, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage externally and internally.

The object of the test is to demonstrate the immunity of the equipment to vibrations at levels appropriate to the service environment.

Testing shall be carried out in accordance with the procedure described in EN 60068-2-6 with the modifications and additions given in 12.7.2.4.

NOTE The vibration operational test may be combined with the vibration endurance test so that the specimen is subjected to the operational test conditioning followed by the endurance test conditioning in each axis.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2 and in accordance with EN 60068-2-47, be connected as required by 11.3 and be operating.

Subject the specimen to vibration in each of the three mutually perpendicular axes in turn, one of which is perpendicular to the plane of mounting of the specimen.

Apply the following severity of conditioning:

1. frequency range : 10 Hz to 150 Hz;

2. acceleration amplitude : 0,981 ms’² (0,1 g_n);

3. number of axes : 3;

4. number of sweep cycles per axis : 1 for each functional condition.

Monitor the specimen during the conditioning period to check that the output voltage is within the manufacturer’s specified limits.

Within 30 min after the end of the recovery period, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage externally and internally.

The object of the test is to demonstrate the ability of the equipment to withstand the long-term effects of humidity in the service environment (e.g. changes in electrical properties due to absorption, chemical reactions involving moisture or galvanic corrosion).

Testing shall be carried out in accordance with the test procedure described in EN 60068-2-78 with the modifications and additions given in 12.8.2.4.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2. The specimen shall not be supplied with power during the conditioning.

Apply the following severity of conditioning:

• temperature : (40 ± 2) °С;

• relative humidity : (93 !§)%;

• duration : 21 days.

Precondition the specimen by raising the temperature slowly from ambient to the conditioning temperature (40 ± 2) °С and hold until temperature stability has been reached before raising the relative humidity, to prevent the formation of water droplets on the specimen.

The object of the test is to demonstrate the ability of the equipment to withstand the long-term effects of vibration at levels appropriate to the environment.

Testing shall be carried out in accordance with the test procedure described in EN 60068-2-6 with the modifications and additions given in 12.9.2.4.

NOTE The vibration endurance test may be combined with the vibration operational test, so that the specimen is subjected to the operational test conditioning followed by the endurance test conditioning in each axis in turn.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2 and in accordance with EN 60068-2-47, connected as required by 11.3 and be operating. The specimen shall not be supplied with power during the conditioning.

Subject the specimen to vibration in each of the three mutually perpendicular axes in turn, one of which shall be perpendicular to the plane of the specimen.

Apply the following severity of conditioning:

After conditioning, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the ability of the equipment to function correctly at high ambient temperatures appropriate to the anticipated service environment.

Testing shall be carried out in accordance with the test procedures with gradual changes in temperature described in EN 60068-2-1 with the modifications and additions given in 12.10.2.4. Test Bd shall be used for heat-dissipating specimens (as defined in EN 60068-2-1) and test Bb shall be used for non-heat-dissipating specimens.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2, be connected as required by 11.3 and be operating.

The specimen shall be conditioned in accordance with Table 7.

Table 7 — Dry heat conditioning

Monitor the specimen during the conditioning period to check that the output voltage is within the manufacturer’s specified limits. During the last hour of the conditioning period, subject the specimen to the reduced functional test.

Within 30 min after the end of the recovery period, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the ability of the equipment to withstand corrosive effects, caused by air pollution.

Testing shall be carried out in accordance with the procedures described in EN ISO 6988 with the modifications and additions given in 12.11.2.4.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2, be connected as required by 11.3 and not be operating.

The specimen shall be conditioned in accordance with Table 8.

Table 8 — Conditioning for SO₂ corrosion test

No measurements are required during this period.

Within 30 min after the end of the recovery period (24 h at laboratory temperature), subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the ability of the equipment to withstand a saliferous atmosphere.

Testing shall be carried out in accordance with the procedures described in EN 60068-2-52 with the modifications and additions given in 12.12.2.4.

Before conditioning, subject the specimen to the functional test required by 12.1 or 12.2.

The specimen shall be mounted as required by 11.2, be connected as required by 11.3 and not be operating.

Connection to the p.s.e. shall be by un-tinned stranded copper wire.

The specimen shall be conditioned in accordance with Table 9.

Table 9 — Conditioning for salt spray test

No measurements are required during this period.

After the test procedure the specimen shall be handled according to EN 60068-2-52:1996, Clause 10. After the test procedure, subject the specimen to the functional test required by 12.1 or 12.2 and inspect it visually for mechanical damage both externally and internally.

The object of the test is to demonstrate the protection against water of the equipment.

Testing shall be carried out in accordance with the procedures described in EN 60529 with the modifications and additions given in 12.13.2.4.

Before conditioning, subject the specimen to the functional test required by 12.2 or 12.2.

The specimen shall be mounted as required by 11.2 including all additional weather protection and be connected as required by 11.3. Power need not be supplied.