WIKA A-1200 Manual De Instrucciones página 7

3. Safety
WARNING!
Physical injuries and damage to property and the environment through exceeding the
performance limits
Exceeding the performance limits can destroy the instrument and lead to danger in the end-use appli-
cation.
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Only use the instrument in applications that lie within its technical performance limits. → For
performance limits, such as derating (maximum current consumption at a corresponding medium
temperature), see chapter 9 "Specifications".
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Any permanent operation in the overload range is not permitted. Above the highest permissible
operating pressure, up to the overload limit, the pressure sensor is operating outside its specifica-
tion. The overload range is intended to prevent damage to the pressure sensor, as part of a pressure
vessel system, during the pressure containment test.
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The overload limit must never be exceeded, even when failures occur in the end-use application.
Loads above the overload limit can cause irreversible damage, which can lead, for example, to
permanent measuring errors.
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The manufacturer or operator of the machine or plant in which the product is used must ensure the
compatibility of the materials of the wetted parts with the medium used.
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The pressure switch should not be used with abrasive or unstable fluids, in particular not with
hydrogen.
Special versions for oil and grease-free applications, as well as for use with oxygen (dangerous fluid in accordance
with Directive 2014/68/EU Article 13, Regulation (EC) No. 1272/2008, or GHS
The (dis-)mounting, installation, parameterisation and maintenance of the model A-1200 in industrial environments
absolutely requires suitably skilled personnel in accordance with chapter 3.3. "Personnel qualification".
Pressure surges below the nominal pressure and shorter than 1 ms can cause measuring errors.
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For applications where pressure spikes can occur, the use of a restrictor is recommended. The
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restrictor narrows the pressure port to 0.6 mm and thus increases the resistance against pressure
spikes.
With media that could block the pressure port (e.g. through particles), it is recommended to use a
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wider pressure port of 6 or 12 mm.
It must be ensured that no atomic hydrogen can form in the pressure port of the pressure sensor.
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1) Globally Harmonized System of Classification, Labelling and Packaging of Chemicals
WIKA operating instructions, pressure sensor, model A-1200
), are available on request.
1)
EN
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