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San Jose, CA, United States

Schueneman H.H.,Westpak Incorporated
Test Engineering and Management | Year: 2015

Experts describe the concept of integrity in the light of the testing function. The scientific method defining the concept assumes that a system with a perfect integrity yields a singular extrapolation within its domain that one can test against observed results. Maintaining a neutral point of view requires scientific testing to be reproducible by independent parties that have morality as a key component of the methods. Source

Schueneman H.H.,Westpak Incorporated
Test Engineering and Management | Year: 2012

Two specific aspects of test lab management, producing accurate and reliable data and in a customer service-focused manner, are discussed. Some procedures for maintaining the integrity of the test specimen include the test protocol, the test equipment, and the test operator. Maintaining controlled documents that give the test operator specific instructions on proper handling of test articles, customer notification procedures, review of test protocols, and verification and checking of equipment settings and software instructions, is also important. One approach to simplifying the task is training on test equipment operation and maintenance and training on reading, understanding, and critiquing test protocols. Records that document training levels and completion are essential part of the clarification from customers, auditors, and, government regulators. Source

Schueneman H.H.,Westpak Incorporated | Schueneman H.H.,Westpak Incorporated | Schueneman H.H.,San Jose State University
Test Engineering and Management | Year: 2011

Several measures that need to be taken while conducting laboratory tests to avoid the mistakes of the past are presented. One of the measures is to conduct Skull Session that may involve some level of theory in the conference room followed by practical in the laboratory. Skull Session topics may include writing a good technical paper, solar reliability and safety testing, package performance and package validation tests, advanced control techniques for vibration test equipment, performance evaluation of photovoltaic modules, and customer service. The sessions also include sinusoidal versus random vibration, history, background, and future, fixturing for shock and vibration testing, management versus leadership in the test lab, and uncertainty of measurement source and use of the data. Another is the Stump the Stars session that would be conducted in an informal setting. Test integrity should always be valued extremely highly in the laboratory. Source

Schueneman H.H.,Westpak Incorporated | Campos J.,Westpak Incorporated
Test Engineering and Management | Year: 2012

One of the greatest challenges facing the photovoltaic (PV) module business is overall reliability when exposed to the outdoor environment for up to 25 years. The modules were allowed to collect wind-induced vibration data over a period of six months covering the winter of calendar year 2010-2011. The data was downloaded from the ride recorders after a three-month interval in order to guarantee that data was being successfully recorded. To demonstrate the value of this approach, both modules were functionally checked and found to be in near perfect condition. Both modules passed the max power output test (Pmax), as well as examination using electro luminescence. The data also shows the value of wind excitation reproduced in the laboratory using high-pressure blowers mounted in a fashion where the distance between the blower and the module can be varied and the orientation of the wind can be adjusted as necessary. Source

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