Description

Description

Woodward released environmentally protected IP56 versions of the DVP (Digital Valve Positioner) in 2008. 　　Testing recently conducted for an unrelated change has determined that the door latches used on these DVP 　　enclosures do not meet the minimum required Ingress Protection rating for use in Zone 2 ATEX or IECEx 　　applications (IP54). 　　This issue only applies to IP56 DVP versions that are installed in ATEX or IECEx classified hazardous locations, 　　and where the DVP enclosure provides the minimum IP54 level environmental protection required by the 　　standards. 　　This issue does not affect units installed in ordinary (non-hazardous) locations, or units installed within larger 　　cabinets or enclosures which meet the minimum IP54 requirement. This issue also does not apply to units 　　installed in North American locations.

　　Description 　　IEC 60079-0 requires 28 days of thermal conditioning at 80C and 90% RH prior to Ingress Protection testing. 　　The minimum rating for equipment at the end of thermal conditioning is IP54. It has been determined that the 　　door latches on the enclosure may allow water and dust to pass the internal O-ring seals after thermal 　　conditioning, which is a failure to meet the IP54 minimum. When tested as new without thermal conditioning, 　　the existing door latches do meet IP56 and IP54. 　　Units installed in North American locations are not affected because the original latch design meets the 　　requirements for North American Class I, Div 2 hazardous locations as well as IP56 without thermal 　　conditioning. 　　There are several hundred IP56 DVP units operating in the field worldwide and there have been no customer 　　complaints or field returns related to water or dust ingress. Woodward also views the thermal conditioning 　　requirements as unrealistic to operating conditions in a typical installation, and believes the risk of seal 　　damage under normal conditions is low. For these reasons, this is considered to be a regulatory compliance 　　issue and not an operational reliability issue. 　　Units sold as IP54 are not affected.

 

Woodward’s approach to secondary education curriculum is successful in meeting the needs and aspirations of our students and in challenging students to become critical thinkers and ethical problem solvers. Administrators, department chairmen, and faculty have delineated graduation standards that meet or exceed all state requirements in the core academic areas; they have designed courses that will enable students to meet GHSA and NCAA and Hope requirements. Counselors, both grade level and college admissions, and the Academic Dean will offer wise counsel along the way as parents and students develop a four-year plan. Guided by our core values of Excellence, Character, and Opportunity, we champion student success. Woodward is committed to providing a broad range of rich academic opportunities which are presented through a variety of teaching techniques.

We believe that the learning environment that is created will help prepare our students for college. The following pages comprise the Upper School Scheduling and Curriculum Guide which serves as a source of information on such academic matters as class scheduling, graduation requirements, academic honors, and semester exam policies for students in grades nine to twelve. In addition, it provides a listing and description of the various curriculum offerings for Upper School students. Students and parents should use this guide to plan the overall course study to be completed during high school. The counseling staff is available to help with any questions you may have and with the planning of the course of study. Classroom teachers and the departmental chairpersons are also valuable resources in helping the student select elective courses and plan course selections for each year. It is highly advisable for the student to finish most or all of the graduation requirements before deciding to take elective or optional courses.

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