Thermotron’s innovative accelerated stress testing systems for Highly Accelerated Life Testing (HALT) and Highly Accelerated Stress Screening (HASS) rapidly detect product failures using industry-leading, patented technology.

Performing HALT and HASS improves product reliability by maximizing laboratory efficiency, reducing costs associated with warranties and recalls.

Characteristics

Adjustable air ducts

optimizes airflow to the product under test

Convenient access to the product

maintain visual and physical access to the products under test through windows and doors.

Data Acquisition System (DAQ)

optional, allows the control and monitoring of the product under test

Door interlocks

prevents doors from opening during operation and prevents operation when doors are open

Internal thermocouple junction box

allows convenient multi-point temperature monitoring

Oxygen monitor and alarm

interfaces with the chamber’s LN₂ system to ensure safe oxygen levels

Internal thermocouple junction box

allows convenient multi-point temperature monitoring

Oxygen monitor and alarm

interfaces with the chamber’s LN₂ system to ensure safe oxygen levels

Safety stop mode

Automatic purging and resetting protects operators, products and equipment

Sound-absorbing insulation

minimizes noise during operation

Additional Options

• Software for the distribution of accumulated fatigue and transmissibility
• Additional accelerometers
• Additional access doors
• Custom finishes
• Data acquisition system
• Nitrogen gas (NG₂) injection system
• Mechanical refrigeration options
• Multi-Zone Control, patented
• TestTools Communication Cards
• Vacuum valves
• Vibration devices

Repetitive Shock

HALT and HASS are powered by repetitive shock vibrations, achieved by a vibrating table. Pneumatic hammers strike the bottom of the table, providing vibrations on 3 axes and 3 rotations, simultaneously.

Thermotron’s patented repetitive shock tables have a unique thermal insulation system that minimizes the thermal load on the chamber and provides a stable condition for the operation of the impactor.

Impactor cooling mechanisms help impactors last longer and reduce maintenance downtime for more effective and efficient testing. The shaker’s spaced mounting design maximizes vibration transmissibility and provides accurate test results.

Multi-zone control

By nature, repetitive shock shakers are not uniform across the entire surface of the table, nor can they control down to a Grms level; this can produce inaccurate results because the level of vibration actually experienced by the product may be higher or lower, depending on the position of the accelerometer.

Thermotron’s unique patented Multi-Zone Control solves this problem. This optional feature controls the repetitive shock table in one, two, or four zones of the table. Through the AST-8800, Multi-Zone Control automatically makes dynamic adjustments to each zone, compensating for system variability including table inconsistencies, impactor wear, air supply, fixtures, and product mounting to accurately test multiple products simultaneously.

Multi-zone control ensures excellent uniformity to test products within 5% of each Grms zone control, making HALT and HASS testing more controllable and consistent.

Each zone can also be set to a different Grms level or the Multi-Zone control can be turned off to control the entire table at one Grms level.

AST-8800 Controller

The AST-8800 controller features an intuitive Windows®-based graphical user interface. The color monitor displays power spectral density, temperature, and vibration data on one screen.

Users define how multiple accelerometers and thermocouples are used to control and monitor the stresses delivered to the product under test.

The AST-8800 controller can be configured to monitor the run time of wear items and automatically alert the operator when periodic maintenance is required.

The system is Ethernet compatible and web-enabled for anytime, anywhere virtual access. Thermotron’s multi-level password-based security system protects sensitive data.

ThermAlarm

Independently prevents the temperature from exceeding user-defined limits.

Product temperature control

Control the air temperature based on the product temperature.

Data recording

Reports system events, temperature and vibration levels.

Program and data storage

Available on hard drive, DVD, USB or network drive.

Built-in vibration spectrum analyzer

View the table and product vibration response.

Product vibration control

Allows vibration control of up to 16 product positions.

System Monitor

Monitors chamber refrigeration pressures (mechanical refrigeration only).

Power Spectral Density Cutoff Limits

Prevents inconsistent vibrations during HASS.

Multi-channel vibration control

Monitor and control accelerometers using maximum, minimum, average or median readings.

Vibration alarm and cut-off limits

Prevents vibration levels from exceeding user-defined limits.

Checking the on-board signal generator

Simplify vibration calibration.

Impactor Monitor System

Illustrates the status of the simulation devices on the screen. The controller monitors the air pressure of each simulation device during testing, adjusting the air pressure for more consistent and accurate results.