Types of Testing Offered by DES:

• HALT
• HASS
• ESS
• Accelerated Life Testing
• Altitude (Vacuum) Testing
• Analysis & Design
• Custom Test & Measurement
• Environmental Testing
• Fixtures
• HAST Testing
• Humidity Testing
• Impact/High G Shock Testing
• MEOST
• Package Testing
• Salt Fog
• Shock (Pyroshock, Ballistic Shock, SRS)
• Solar (UV) & Weather Testing
• Specification Testing
• Temperature Testing
• Thermal Shock Testing
• Vibration & Shock Testing

We are growing and constantly adding capabilities!

ESS

Environmental Stress Screening (ESS) is applied during the production process to improve reliability and reduce warrantee costs. ESS is a screening method used to precipitate and find defects thus exposing manufacturing process problems that would cause a failure in normal field environments including shipping, storage and use. DES is capable of performing MIL-HDBK-2164.

Equipment Capabilities:

• Temperature Range of -100°C to +200°C (-148 °F to +400 °F)
• Temperature Rate of Change up to 60°C/minute
• Random Vibration beyond 50 Grms & 0 - 3,000 Hz Frequency Range
• Custom Production ESS Fixtures Designed & Built

Why Choose DES for ESS?

• We have the experience & equipment required to execute a successful ESS program.
• Manufacturers are currently subcontracting their ESS to DES with great success.
• We are capable of handling high volume projects.
• It may be more economical and efficient for DES to perform your ESS since we already have the specialized equipment and facilities in place.
• We can provide total process and data management in production. We will conform to your quality and reporting requirements including supplying pass/fail certificates with every product.

Altitude (Vacuum) Testing

Altitude (Vacuum) testing is used to determine whether material can withstand the low pressure environment associated with high altitude or use in aircraft.

Equipment Capabilities:

• Altitude range to 80,000 ft (0.8 in Hg)
• Altitude combined with hot and cold temperatures

Fixtures

Let DES design and make your specialized test fixtures. We have designed and built many successful HALT, HASS, vibration, and custom test fixtures. We work with very skilled local machine shops and fabricators that can weld or machine many types of metals such as aluminum, magnesium, stainless steel, and carbon steel.

Fixture Capabilities Include:

• Custom Mechanical or Electronic Test Fixtures
• HALT or production HASS test fixtures
• Vibration Test Fixtures
• Create Custom Testing Equipment

Highly Accelerated Stress Test (HAST)

HAST (Highly Accelerated Stress Test) reduces the time it takes to complete humidity testing by increasing temperatures above 100°C and increasing the atmospheric pressure. Normal humidity tests can be completed in days, not weeks while maintaining the same failure mechanisms.

Equipment Capabilities:

• Temperature range from 105°C to 150°C (221°F to 302°F)
• Humidity Range from 75% to 100%
• Max Pressure of 56 psig

Impact and High G Shock Testing

Impact or High G Shock Accomplished with Drop Tower.

Impact Capabilities:

• Maximum Impact Velocity of 250 in/sec (21 ft/sec)
• Impact Head Weights of less than 1 lb to 50 lb
• Maximum Impact Energy of 3,600 in-lb (300 ft-lb)
• Many Differently Shaped Impact Heads Available

High G Shock Capabilities:

• Maximum Acceleration of 5,000 G
• Shock Pulse Duration Range of .2 Msec to 60 Msec
• Sine, Square, and Saw tooth Shock Waveforms

MEOST

Multiple Environment Over Stress Testing (MEOST) is a test program that uses a combined environment of extreme stresses to quickly expose your product’s design and manufacturing weaknesses. Typical stresses include temperature, vibration, electrical, and humidity. In MEOST, the durability of your product is tested for each individual stress, and also for the combined interaction of all stresses. By performing MEOST, you will be able to ensure that your product is rugged before it goes to the market.

Package Testing

Typical Tests Include: ISTA, ASTM D999, D4169 and D4728.

Equipment Capabilities:

• Random or Sinusoidal Vibration
• Drop Testing
• Environmental Conditioning
• Package Compression Testing

Salt Fog

Salt Fog Testing is used to determine the corrosion resistance of paints, finishes and electrical connections. Typical tests include ASTM, MIL-STD-810F and RTCA/DO – 160.

Equipment Capabilities:

• Various Salt Concentrations
• Temperature Control and Humidity

Shock (Pyroshock, Ballistic Shock, SRS)

Pyroshock (Pyrotechnic Shock) or Ballistic Shock are tests that simulate shock forces from the firing of projectiles, missiles or rockets. Shock Response Spectrum (SRS) analysis is available to measure the acceleration as a function of frequency and the total energy of the applied shock pulse.

SRS Analysis of Ballistic Shock by DES

Specification Testing

DES can test to many specifications including:

• ASTM
• Custom Specifications
• IATA
• IEC
• IPC-SM-785 & IPC-9701
• JDEC
• MIL-STD’s including MIL-STD 167, MIL-STD 202, & MIL-STD 810
• RTCA/DO – 160
• SAE
• Telcordia

Vibration and Shock Testing

Dynamic Solutions
ED Vibe Shaker

Is your product rugged enough to survive loads due to shipping, dropping, transportation, and harsh environments? Let DES prove its durability in our lab. DES can perform vibration and shock testing to aerospace, automotive, medical, telecom, and military specifications.

DES can apply many types of vibration and shock loads in all 3 axes using our Electro-Dynamic Shaker System. We are able to control or monitor multiple accelerometer channels.

Equipment Capabilities:

• 4,500 lbf force sustained vibration loads
• Up to 9,000 lbf shock loads
• 0-3,000 Hz Frequency Range
• Over 100g's peak acceleration
• Vibration: Sine, Random, Sine on Random, Random on Random
• Shock: Haversine, Half-Sine, Saw-Tooth, & Trapezoid
• Replication of Measured Field Data
• Gunfire Vibration
• Shock Response Spectrum

Test Applications Include:

• Reliability Testing
• Accelerated Life Testing
• Shock Loads
• Transportation Load Simulation
• Production Stress Screening
• Squeak & Rattle Testing
• Package Testing
• Product Development
• Fatigue due to vibration
• Fragility