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
ENVIRONMENTAL TESTING
APPLICATIONS
QUALIFICATION
TESTS

ENVIRONMENTAL
STRESS SCREENING
(ESS)
HIGH
ACCELERATED
TEST (LIFE OR ESS)
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!
STANDARD TOOLS FOR QUALIFICATION TESTS
CONTENTS
PART TWO : LABORATORY TEST METHODS
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
Low Pressure (Altitude)
High Temperature
Low Temperature
Temperature Shock
Contamination by Fluids
Solar Radiation (Sunshine)
Rain
Humidity
Fungus
Salt Fog
Sand and Dust
Explosive Atmosphere
Immersion
Acceleration
Vibration
Acoustic Noise
Shock
Pyroshock
Acidic Atmosphere
Gunfire
Temperature, Humidity, Vibration, Altitude
Icing/Freezing Rain
Ballistic Shock
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

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
30
20
10
0
THIS IS ONLY A SURVEY !
(EUROPEAN)
Industrie
S.p.A.
ESS TOOLS
“FAST” CHAMBER COMBINED
WITH SHAKER
CST 130 S
Main Characteristics
External dimension
1400x1780x1950 mm
Internal Dimension
580x510x420 mm
Maximum Load
Temperature Range
30 Kg
-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
THIS IS A HIGH ENVIRONMENTAL
AND FUNCTIONAL STRESS APPLIED
TO A TEST OBJECT TO PRODUCE A
“HIGH ACCELERATION” OF THE LIFE
SCREENING STRENGTH
screening
strength
TEMPERATURE CYCLING
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
10
Industrie
S.p.A.
20
30
40
50
cycles
RELIABILITY
reliability
HALT
2-6 UNITS
QUAL
1- 20 UNITS
time
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
HALT CHAMBER FOR AERONAUTICAL
APPLICATIONS
TEMPERATURE-HUMIDITYVIBRATION-VACUUM
HALT CHAMBER WITH HORIZONTAL & VERTICAL
VIBRATIONS
BASICS OF ACCELERATION
BASIC PHILOSOFY IS :
RAPIDLY CYCLING BETWEEN EXTREME
ENVIRONMENTAL CONDITIONS
ACCELERATION CAN BE APPLIED ALSO TO CORROSION
TESTS
ACCELERATING CORROSION
THE “DRY CORROSION TEST” :
 APPLY THE
ACCELERATION
BASIC
CONCEPTS,
 MATCHES THE REAL LIFE EVENTS
DRY
GOOD WEATHER
WINDY DAY
WET & SALTY
RAIN
NIGHT DEW
TESTING TOOL
MODULAR
CONFIGURATION
ANTI-DRIPPING
COVER
PNEUMATIC
& HYDRAULIC
SYSTEMS
TEST CHAMBER
ELECTRICAL
& CONTROL
SYSTEM