Jun 20, 2025
Discover what conformance testing is, its process, tools, and why it’s crucial for telecom and electronic product compliance.
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Discover what conformance testing is, its process, tools, and why it’s crucial for telecom and electronic product compliance.
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New Post has been published on http://engineer.city/improved-conformance-testing-for-gravimetric-sorption-analysers/
Improved conformance testing for gravimetric sorption analysers
Hiden Isochema has introduced a NIST traceable method for assessing the combined pressure, uptake and temperature measurements of gravimetric sorption systems.
An in situ densitometry procedure is used to simultaneously determine mass and volume of an externally calibrated float. The volume is measured within 0.001 cc across the analyser pressure range and is equivalent to a 1 µg (microgram) air displacement at standard temperature and pressure.
A specific tolerance is calculated from the test conditions and the sensor specifications of a given analyser to yield a clear pass / fail condition for certification. The method also enables both the absolute combined accuracy and linearity to be quantified in specific operating conditions since it can be applied to any species including non-ideal gases such as carbon dioxide and methane.
This rigorous conformance testing is applied as standard to all new IGA and XEMIS series analysers and also during routine instrument servicing. A test kit and accompanying software protocol is also offered for user conformance testing to suit the requirements of their site quality management system.
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ISO/IEC 9314-26:2001, Information technology - Fibre Distributed Data Interface (FDDI) - - Part 26: Media Access Control Conformance Testing (MAC-ATS)
ISO/IEC 9314-26:2001, Information technology - Fibre Distributed Data Interface (FDDI) - - Part 26: Media Access Control Conformance Testing (MAC-ATS) This part of ISO/IEC 9314 contains the abstract test suite for the Fibre Distributed Data Interface (FDDI) token ring Media Access Control (MAC) layer protocol. This test suite was developed based on the principles defined in OSI Conformance Testing Methodology and Framework (ISO/IEC 9646) and written in Tree and Tabular Combined Notation (TTCN), and intended for testing conformance to the MAC standard (ISO/IEC 9314-2:1989) of any FDDI stations.The test methodology is the “remote single layer test” as described in ISO/IEC 9646. The abstract test scripts specify the MAC layer Protocol Data Units (PDU) to be exchanged between the two MAC entities, the MAC on the tester and the MAC on the Implementation Under Test (IUT). The tester is called the Lower Tester (LT).The test suite does not require use of any higher layer protocols, nor does it assume existence of Logical Link Control (LLC) layer implementation on the IUT. It expects, however, that the Station Management (SMT) function is available on the IUT. Since MAC itself does not originate any data frames, the tester uses SMT to test the processing capability of MAC by sending frames to SMT and observing the SMT originated response frames.The testing is expected to be conducted in a controlled environment with a minimum configuration (figure 1): a token ring with two stations, one being the LT and the other the IUT. Get th¡s οnё!i. Dοnοt mìss thе сhαnce!