STW TC1 - Page 369

13 Qualification Tests
User Manual 369/374
Standard
Test description
Parameter
ISO 16750-4
IEC 60068-2-14, Test
Na
Temperature cycling test -
rapid change of temperature
100 cycles, from -40 °C to +70 °C
transfer time ≤ 30 seconds
dwell time: 60 minutes
ISO 16750-4
IEC 60068-2-52, Test
Kb
Salt spray tests - corrosion test
Severity level 5
ISO 16750-4
IEC 60068-2-38, Test
Z/AD
Humid heat, cyclic test -
Test 2: Composite temperature / humidity
cyclic test
10 cycles each 24 hours, 5 of them with
frost phase (-10 °C)
upper temperature: +65 °C, 93 % relative
humidity
ISO 16750-4
IEC 60068-2-78
Damp heat, steady-state test
Severity: (40 ± 2) °C and (85 ± 3) %
humidity
test duration: 21 days - 20 days and 23
hours without
operation, the last hour in typical
operation mode
ISO 16750-4
IEC 60068-2-60, Test
Ke,
method 4
Corrosion test with flow of mixed gas
Test duration: 10 or 21 days
(SO2, H2S, NO2, CL2)
IEC 60529
IP code
IP6x, IPx7, IPx9k
ISO 16750-5
Chemical loads
Sulfuric acid 37 %, brake fluid, engine oil,
hydraulic oil,
petrol/gasoline unleaded, urea, diesel
fuel
cold cleaning agent