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EO testing

Dynatec Scientific Labs has been serving the Medical Device Industry since 1989. Dynatec holds recognition as a Small/Disadvantaged Business Enterprise with the State of Texas and the City of El Paso.

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EO testing

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  1. Types of Extraction Methods Used in EO Testing

  2. Professional EO testing facilities use extensive extraction techniques to gather the samples to be analyzed. These extraction methods include direct-drive gimbals and rotary positioners. The methods are also called simulated-use extraction. In addition to performing EO tests, these facilities perform simulated-use extraction. Here are a few things to consider when looking for an EO testing facility. Read on to learn more about the different types of extraction methods available.

  3. Direct-drive gimbals In EO testing, direct-drive gimbals are ideal solutions because they offer the highest acceleration and tracking precision among available gimbals. Direct-drive gimbals are specially designed for high-duration applications and can be configured to cover two axes of motion. Rotary positioners are a popular choice for hemisphere coverage, and can also be configured to accommodate two axes of motion.

  4. Gimbals can be configured to include multiple drive strategies, including IR Windows and SPLtrade software. In EO sensor testing, direct-drive gimbals provide superior performance, while tangent-arm gimbals have low in-position jitter. Both types of gimbals have their advantages and disadvantages. Fortunately, both designs offer several advantages.

  5. Rotary positioners Direct-drive gimbals and rotary positioners are the best solutions for EO testing. They provide high acceleration, low jitter tracking, and fast direction reversal, and are ideal for applications requiring precise, high-duty cycle pointing. The two types of positioners are compatible with each other and are designed for use with various EO test solutions, including linear stages. In addition, the servos in both types of positioners play a critical role in successful EO testing.

  6. Both types of positioners are available in miniaturized versions. Air bearings offer better than one mrad of accuracy over 360 degrees of travel, and direct-drive gimbals are highly durable and cost-effective. High-resolution, high-stability z-positioning is possible with direct-drive gimbals. They also offer high-duty cycles. Precision positioners are available with different bearing configurations and designs.

  7. Tangent-arm driven rotary stage When analyzing the EO performance of sensors, a tangent-arm-driven rotary stage is a superior solution. This stage features a direct encoder mounted on the output shaft for increased positioning accuracy and repeatability. It is also able to eliminate kinematic over constraint by offering incremental motion steps below 0.5 micro radians. The in-position jitter is as low as a few Nano radians. The output angular motion is often limited to a few degrees.

  8. Another option is the Optikos LP-1000 lens platform, which has a thoughtful design and capacity to test most lenses. A tangent-arm-driven rotary stage consists of two massive aluminum castings: a stator and a rotor. The stator remains bolted to the optical table, while the rotor arm is able to rotate the unit under test. A home position sensor is built into both models.

  9. Limited use extraction EO testing for limited use extracts is essential when using a product to ensure that it does not expose patients or workers to unacceptable levels. This type of testing must follow the manufacturer's instructions for extraction. The sample must be sterilized before the testing begins. In some cases, residual EO analysis may also be required. For medical device products, the sponsor's instructions must be followed in order to ensure the maximum level of EO remains after extraction. There are two types of extraction methods: exhaustive extraction and simulated use extraction.

  10. Simulated-use extraction is another method used to test EO in a limited-use extract. It simulates the exposure of a user or patient to the EO residuals. A parenteral device is tested by filling the fluid path and exposing it to a variety of temperatures to assess the residual levels. This allows analysts to calculate the effects of extended exposure. To perform EO testing in this way, a standard EO in methanol is used.

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