To show how susceptible instruments are to outside interference, we had a pH meter without the CE Mark tested against HI 98240 from Hanna (shown below). Both meters had a purported 0.01 pH margin of error. Both meters were subjected to the effects of an external electromagnetic field, in accordance with the procedures established by the CE Directives. The graphs show the measurements taken at different frequencies. As you can see from the histograms, at 3 V/meter and 100 MHz frequency, the Hanna meters stayed within the stated tolerance, wheras the non-CE model displayed an erroneous reading of almost 5 pH! The rest of the graph also demonstrates that the readings from the Hanna meter remained practically unvaried throughout the test. Our commitment to provide quality products for our customers has resulted in instruments manufactured by Hanna, complying with the European Directives EN 61000-6-1, EN 61000-6-3 and EN 61010-1. SUSCEPTIBILITY TEST pH Meter without CE Mark FREQUENCY (MHz) E R R O R SUSCEPTIBILITY TEST Hanna HI 98240 FREQUENCY (MHz) E R R O R Hanna Meter Vs. Meter without CE ISO Standards ISO 9000 standards were adopted in 1978 by the International Organization of Standards in Geneva, Switzerland, as a uniform standard of excellence for use in the European Economic Community. The standards were an immediate success and have since been adopted in more than 90 countries around the world, including the USA. In order to obtain an ISO 9001:2015 Certification, each of the following departments need to comply with rigorous ISO standards: 1. Design/Development: Hanna products are designed, developed and engineered under ISO 9001:2015 standards. 2. Production: Every instrument undergoes stringent Quality Control tests at different stages of manufacturing. 3. Quality Assurance: All meters undergo 100% quality control checks prior to shipment. 4. Installation and Servicing: Hanna provides unsurpassed level of customer service, technical support and after sales assistance. With Hanna, you receive products manufactured to the most stringent quality standards. Hanna is an ISO 9001:2015 certified company. Our production system is certified to guarantee our customers a quality product every time. ISO 9001:2015 Compliance 16 Glossary 16.5 www.hannainst.com |
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