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Trondheim, Februar, 2003. CONTENTS. ENVIRONMENTAL TESTING OVERVIEW QUALIFICATION TESTS MIL-STD-810 F PRODUCTION SCREENING HIGH ACCELERATED TESTS (HALT & HASS) ENVIRONMENTAL STRESSES SCREENING STRENGHT ACCELERATION FACTORS ACCELERATED TEST MACHINES ACCELERATED TEST ADVANTAGES.

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contents

Trondheim, Februar, 2003

CONTENTS

ENVIRONMENTAL TESTING OVERVIEW

QUALIFICATION TESTS MIL-STD-810 F

PRODUCTION SCREENING

HIGH ACCELERATED TESTS (HALT & HASS)

ENVIRONMENTAL STRESSES

SCREENING STRENGHT

ACCELERATION FACTORS

ACCELERATED TEST MACHINES

ACCELERATED TEST ADVANTAGES

slide2

ENVIRONMENTAL TESTING APPLICATIONS

HIGH ACCELERATED TEST (LIFE OR ESS)

QUALIFICATION TESTS

ENVIRONMENTAL STRESS SCREENING (ESS)

1 qualification test
1 - QUALIFICATION TEST

THIS IS THE MOST COMMON/KNOWN TEST WHICH :

  • VERIFY THE COMPLIANCE WITH THE ENVIRONMENTAL REQUIREMENTS FOR THE PRODUCT,
  • ALLOWS TO SUPPLY QUALITY PRODUCTS ABLE TO PERFORM WITHIN THE SPECIFIED OPERATING ENVIRONMENT

NOTE : THIS IS THE WRONG PLACE FOR SURPRISES, ENVIRONMENTAL DESIGN MISTAKES WILL BE VERY EXPENSIVE!

slide5

CONTENTS

PART TWO : LABORATORY TEST METHODS

500 Low Pressure (Altitude)

501 High Temperature

502 Low Temperature

503 Temperature Shock

504 Contamination by Fluids

505 Solar Radiation (Sunshine)

506 Rain

507 Humidity

508 Fungus

509 Salt Fog

510 Sand and Dust

511 Explosive Atmosphere

512 Immersion

513 Acceleration

514 Vibration

515 Acoustic Noise

516 Shock

517 Pyroshock

518 Acidic Atmosphere

519 Gunfire

520 Temperature, Humidity, Vibration, Altitude

521 Icing/Freezing Rain

522 Ballistic Shock

2 ess
2 - ESS

THIS IS A SCREENING DURING THE PRODUCTION PROCESS WHICH :

ACCELERATE THE TEST OBJECT LIFE

IN ORDER TO

DETECT “INFANT MORTALITY” AND LATENT FAILURES OF THE TEST OBJECT LIFE

ess targets
ESS TARGETS
  • TO MEET RELIABILITY REQUIREMENTS FOR CRITICAL SYSTEMS IN TRASPORTATION, TELECOMUNICATION, MILITARY . . .
  • TO DECREASE THE WARRANTY COST AND SOMETIMES THE TOTAL PRODUCTION COSTS
  • TO IMPROVE THE SUPPLIER IMAGE THROUGH IMPROVED MTBF AND LIFE CYCLE COST OF THE PRODUCT
  • TO VERIFY THAT THE PRODUCT CAN RELIABLY PERFORM IN THE SPECIFIED ENVIRONMENT
ess techniques

Relative weight

40

Random Vibration

High temperature

30

Elettrical stress

Sweep Sin Vibration

Combined environment

Thermal shock

Low temperature

Sin Vibration

Mechanical Shock

20

Humidity

Acceleration

10

Altitude

0

Industrie

S.p.A.

ESS TECHNIQUES

Thermal cycling

THIS IS ONLY A SURVEY ! (EUROPEAN)

slide9

ESS TOOLS

“FAST” CHAMBER COMBINED

WITH SHAKER

slide10

CST 130 S

Main Characteristics

External dimension 1400x1780x1950 mm

Internal Dimension 580x510x420 mm

Maximum Load 30 Kg

Temperature Range -80°C / +220°C

Temperature Accuracy 0.5°C

Heating Temperature Rate 40°C/min

from -55°C to +125°C

Cooling Temperature Rate 28°C/min

from +125°C to -55°C

Recovery time 15min

(-55°C / +125°C) with 6 Kg

Max electrical power 17Kw

3 high accelerated life
3 - HIGH ACCELERATED LIFE

THIS IS A HIGH ENVIRONMENTAL AND FUNCTIONAL STRESS APPLIED TO A TEST OBJECT TO PRODUCE A “HIGH ACCELERATION” OF THE LIFE

screening strength temperature cycling

Industrie

S.p.A.

SCREENING STRENGTHTEMPERATURE CYCLING

screening

strength

20°C/min

0.8

15°C/min

10°C/min

0.7

0.6

5°C/min

0.5

0.4

0.3

0.2

0.1

cycles

10

20

30

40

50

reliability
RELIABILITY

HALT2-6 UNITS

reliability

ESS100-200 UNITS

QUAL1- 20 UNITS

time

typical characteristics for high environmental stress chamber
TYPICAL CHARACTERISTICS FOR HIGH ENVIRONMENTAL STRESS CHAMBER
  • VOLUME ~ 1M3
  • COOLING ~ MECHANICAL AND/OR LN2
  • TEMP. RANGE ~ -60°C TO 100°C
  • TEMP. RATE ~ 5 TO 30°C/MIN
  • AIR FLOW ~ 2 TO 5M/SEC
  • POWER ~ 40 TO 200 KW
  • INTERFACE ~ SHAKER
  • PRICE ~ 40K TO 250K USD
slide15

HALT CHAMBER FOR AERONAUTICAL APPLICATIONS

TEMPERATURE-HUMIDITY-VIBRATION-VACUUM

basics of acceleration
BASICS OF ACCELERATION

BASIC PHILOSOFY IS :

RAPIDLY CYCLING BETWEEN EXTREME ENVIRONMENTAL CONDITIONS

ACCELERATION CAN BE APPLIED ALSO TO CORROSION TESTS

accelerating corrosion
ACCELERATING CORROSION

THE “DRY CORROSION TEST” :

  • APPLY THE ACCELERATION BASIC CONCEPTS,
  • MATCHES THE REAL LIFE EVENTS

WET & SALTY

DRY

GOOD WEATHER RAIN

WINDY DAY NIGHT DEW

testing tool

MODULAR

CONFIGURATION

TESTING TOOL

ANTI-DRIPPING

COVER

PNEUMATIC

& HYDRAULIC

SYSTEMS

ELECTRICAL

& CONTROL

SYSTEM

TEST CHAMBER