Environmental Science

ENVIRONMENTAL TESTING TYPES AND PROCESSES
Laboratory Services
Industrial Sectors
ENVIRONMENTAL TESTING TYPES AND PROCESSES

Temperature Humidity Testing 
Temperature and humidity chambers are used to test the influence of temperature and humidity on the products. Tests involved subjecting the products to the cycling of the temperature and humidity of the chambers.

Thermal Shock Testing 
Thermal Shock is performed to determine the ability of a part (electronics devices, electronic products, etc) to withstand sudden changes in temperature.

Vibration Testing and Methodology 
Vibration testing is the shaking or shocking

Vibration Test Systems, including the shaker, amplifier, control system, slip tables, head expanders, and fixtures. From running random, sine-to-shock, sine-on-random, and random-on-random tests, Thermotron’s versatile performance can meet your specific testing needs.

Our electrodynamic shakers feature superior acceleration, velocity, force, and shock performance. With a rugged, lightweight magnesium armature, a powerful IGBT-based amplifier, and an intuitive Windows®-based vibration control system, Thermotron’s DSX-Series electrodynamic shakers provide durability and versatility that meet a variety of vibration testing applications

asking of a component or assembly to see how it will stand up to real life environment
The following are some examples of different types of simulation testing:

Burn-In Burn-In is a traditional form of testing when large batches of products are tested together at an elevated temperature to aid in the precipitation of premature failures. Elevated temperature conditions are achieved using the heat from products under test or from a heating element. Burn-In tests are commonly done with the products under test powered, and temperatures may be cycled occasionally, which causes some degree of thermal cycling as the devices heat and cool. The ease with which burn-in is implemented must be weighed against the relatively low screening effectiveness and long test times, which is why many companies are turning to temperature cycling.

Temperature Cycling As demands increase to reduce testing time and as understanding stimulation grows, companies are transitioning from burn-in to temperature cycling for testing electronics. Temperature cycling is the rapid change between predetermined temperature extremes for multiple cycles. While temperature cycling is considered more effective and efficient than burn-in, there are a few complications to overcome. Good airflow, for example, is important because it maximizes heat transfer and ensures the actual product temperature follows the chamber air temperature. It also prevents the formation of hot/cold spots within the workspace of the chamber. Ramp rate, or the speed in which the chamber can change the air temperature, is also an important consideration. Faster ramp rates are more effective stresses for a given number of cycles; however, if the ramps are too fast they might cause undesired damage. A typical temperature profile transitions between -40°C and 125°C, at 5°C to 15°C per minute. At the temperature extremes, dwell periods (a period of time when the temperature is stable) are used to allow the product temperature to catch up to the air temperature. Thermal Shock, a form of temperature cycling, exposes a small number of products to severe and extreme temperature changes. This normally is accomplished by moving the products between hot and cold zones of preconditioned air or fluid. Thermal shock can be used for design validation and pre-production validation testing.

ESS Environmental Stress Screening (ESS) identifies weaknesses in manufacturing materials and processes while in production. In an ESS process, every product is subjected to stimulus. The objective of stress screening is to eliminate products that would fail early in use to reduce product infantile mortality rates. A complete exploration of ESS is available as a handbook. The following is an example of stimulation testing:

HALT & HASS Highly Accelerated Life Testing (HALT) uses aggressive temperature change rates and multi-axis repetitive shock vibration to reduce required testing time. HALT tests a product to the point of failure to uncover product weaknesses, operating limits, and destruct limits prior to production. HALT is used to detect design defects in order to make design enhancements. Highly Accelerated Stress Screening (HASS) is a production process used to screen out defective products prior to shipment. HASS uses similar, but less aggressive, stresses to those used in HALT. More details on HALT and HASS are available in a handbook. Overall, stimulation testing applies stresses to products, bringing them to their breaking points, to improve and ruggedize them. Simulation testing ensures products are reliable and will function as intended. Environmental testing is an important aspect of product design and development. Each product may need different types of testing depending on their intended use environment, design, and materials.

Laboratory Services

SANRAY has a state-of-the-art analytical testing laboratory facility. Laboratory services include:

  • Hot and Cold Chambers.
  • Humidity Chambers.
  • Rain, Dust chambers.
  • Shock and Vibration test facility.
  • Microbiology Testing
  • PCBs Testing
Industrial Sectors

SANRAY offers services across India serves government organizations, private sectors and NGOs. We have wide and vast experience in serving many industrial sectors as listed below:

  • Mining of Minerals (Opencast and underground)
  • Offshore and Onshore Oil and Gas Exploration, Development & Production
  • Thermal Power Plants
  • Coal Washeries
  • Metallurgical Industries (Ferrous &Non Ferrous)
  • Cement Plants
  • Asbestos Milling and Asbestos based products
  • Synthetic Organic Chemicals Industries
    • Dyes & dye intermediates
    • Bulk drugs and intermediates excluding drug formulations
    • Synthetic rubbers
    • Basic organic chemicals
    • Other synthetic organic chemicals and
    • Chemical intermediates
  • Oil & Gas Transportation Pipelines including LNG Terminals
  • Airports
  • Industrial Estates/parks/ complexes, export processing zones, special economic zones, biotech parks, leather complexes
  • Building & Construction Projects
  • Townships and Area Development Projects
  • Ports and Harbours
  • Isolated Storage & Handling of Hazardous Chemicals;
  • Solar Power and Wind Power Plants
  • IT Industry
  • Waste Management Companies
  • Hospitals
  • Audio equipment – Domestic electronic appliances & accessories
  • Electronic components & equipment subassemblies
  • EMC Test Facility
  • Environmental Test Facility –
  • Equipment Used In Clinical Laboratory –
  • IT Equipment –
  • Medical Electrical Equipment
  • Power supplies & stabilizers 
  • Safety Testing Facility 
  • Miscellaneous Products