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Environmental qualification (climatic and mechanical tests)

 

Qualification of an equipment aim to demonstrate its capability to perform its function.

 

In the case of electrical and electronic products, an environmental qualification consist in checking the functional criteria in 4 fields:

  • electromagnetism (see EMC qualification),
  • thermal or climatic (resistance to heat, to cold, to humidity, to fast temperature changes, ...),
  • mechanical (vibration tests, shocks, acceleration, ...)
  • general environment (sand, dust, fungus, solar ray, salt spay,...)

 

 

Qualification phases and nature of EMC environment are different from others. This is why EMC labs are separate from climatic and mechanical labs (often called environmental lab).

 

 

 

 

The context of environmental test

Qualification in environment may be applicable to any economic sector.

They concern systems and sub-parts directly subjected to environmental constraint (on-board electronics, outdoor equipment's,…) with specification defining the level of constraint depending on the stress (launcher and satellite, military equipment,…). They also concern the safety functions of the products (control system, active safety device,…).

They indirectly concern indoor fixed devices when taken into account environmental stress during transportation.

Specifications setting the nature of the environment and the requirement level are based on the life cycle of the product.

An helicopter gunship may be able to take off from a desert (heat), fasten gain altitude (cold and RTV), and make automatic fire. All these actions may be translate in specifications into thermal constraints (heat, cold, RTV), and vibrations like narrow band random-on random (exceptional random vibration – fire on stochastic phenomena – helicopter's rotor).

In-situ measures may support the writing of a qualification plan (QTP – Qualification Test Plan).

 

 

 

 

Standards and specifications treated*

Heat-Cold-Humidity tests, Rapid Temperature Variation, Corrosion, Thermal Shock, Climatic & Mechanical combined test, sinusoïdale random, random, sine on sine, mechanical shock (all waves form), Shocks SRS, landing and catapult launching. Control from traffic profiles. In situ measurement with an independent acquisition system. Resistance to solar ray. Rolling pitching.

 

 

Standards

NF EN 60068-2-xx

CEI 60068-2-xx

ETS 300 019-2-xx

RTCA DO 160

GAM EG 13

MIL STD 810

NF X 41002

...

Specifications

OIML R117

EUROCOPTER

RAFALE

AIRBUS

PSA B21

RENAULT

GENERAL MOTORS

...

 

 

 

*non exhaustive list, please contact us for more info

Laminarflow modules on shaker 90 kN
(Number of particles 100)

 

 

 

Combined tests

 

 

 

 

Instrumentation

  • Salt spray chambers
    • Number : 4
    • Work space from 0,4 to 13 m³
  • Thermal shock chambers
    • Number : 5
    • Temperature : - 70 to + 190 °C
    • Transfert time : - 10 s
    • Software control
    • Work space (mm) : 790 x 740 x 850
  • Climatic chambers
    • Number : 52
    • Work space from 0,1 to 29 m³
    • Temperature range : - 70 to + 400 °C
    • Rapid Temperature Variation - RTV : 20 °C/min
    • Humidity range from 10 to 100 % Hr
  • Climatic chambers for combined test
    • Number : 3
    • Temperature range : - 70 to + 150 °C
    • Rapid Temperature Variation - RTV : 10 °C/min
    • Humidity range : 20 to 100 % Hr
    • Work space (mm) : 1000 x 1000 x 1000
  • Shakers
    • Number : 16
    • Frequency : 3 to 3000 Hz
    • Max. acceleration : 150 g
    • Displacement : 2 pouces
    • Bench dimensions (mm) : 1250 x 1250
  • Hydraulic cylinders
    • Number : 2
    • Frequency : 0,1 to 200 Hz
    • Max. acceleration : 10 g
    • Displacement : 100 mm
    • Bench dimensions (mm) : 1200 x 1200
  • Shock and jolt equipments
    • Number : 3
    • Max. acceleration : 5000 g
    • Max. weight of the product: 800 kg
  • Centrifuges
    • Number : 2
    • Max. acceleration : 100 g
  • Depression chambers
    • Number : 2
    • Up to 100 mbar absolute pressure
  • Overpressure room
    • 1,3 bar (RTCA DO 160 E)
  • Ingress of protection
    • Diverse devices for IP tests : dust and rain
  • Ressistance tests
    • Robots
  • HALT & HASS
    • Number : 1
    • Temperature range : - 100 to + 200°C
    • Rapid Temperature Variation - RTV : 60 °C/min
    • Frequency : 10 à 10000 Hz
    • Max. acceleration : 50 g
    • Vibrations : 6 DOF
    • Work space : 1,14 m³

 

 

 

Related links

Automotive
Qualification automobile   On-board electronic systems

Our test capacity for EMC, climatic and mechanical environment,... allows us to offer you a global solution.

Military
Marqualification militaire   Air force - Army - Navy

Our technical support at each key step of your project secures the chance of your success.

Aerospace
Marchés Exports   Civil aviation and space
Benefit from a single contact for your qualifications.
Training
Formation   Intra and inter company courses
Since 2008, our training integrate an issue on vibrations and shocks in mechanical environment.
Engineering
Ingénierie   Assistance before the tests

From the follow-up of your qualification to a complete assistance in your project management, we offer custom answer to your need.

 

 

 

 

Vos contacts
 
Versailles centre
 
Switchboard: +33 (0)1 30 57 55 55
Mr HJAJI Mohammed
33 (0)1 30 97 05 72
Mr EL MAGHRAOUY Abdel
33 (0) 1 30 97 05 89
Mr FAUCHEUR Christophe
33 (0) 1 30 97 05 84