797 / 836
To show how susceptible instruments are to outside interference,
we had a pHmeter 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 electro-
magnetic 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 standardswere 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 9001:2008 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 9001:2008 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 9001:2008 certified company.
Our production system is certified to guarantee
our customers a quality product every time.
ISO 9001:2008 Compliance
17
Glossary
17.5
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