WIKA NS160 Betriebsanleitung Seite 6

2. Safety
3. Static electricity
- To avoid electrostatic charging, the instrument must be included in the equipotential
bonding of the system. This can be done via the process connection or other suitable
measures.
- The instrument can optionally contain components with a non-conductive surface
coating or lining. In such cases, the operator must take appropriate measures to
prevent electrostatic charging.
- Metal components of the instruments (e.g. TAG plates) must be included in the equipo-
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tential bonding of the system during installation and operation.
4. Adiabatic compression and shock waves
With gaseous media, the temperature may increase as a result of compression warming.
In these cases it may be necessary to throttle the rate of change of pressure or reduce
the permissible medium temperature.
5. Chemical reactions
The operator must ensure that chemical reactions between wetted parts, process
medium and environment are excluded. The materials used can be found in the instru-
ment marking. See chapter "2.6 Labelling / Safety marks".
On the wetted parts of the instrument, small residual amounts of the adjust-
ment medium (e.g. compressed air, water, oil) can adhere from production.
With increased requirements for technical cleanliness, suitability for the appli-
cation must be checked by the operator before commissioning.
Liquid media with the property of changing the volume during solidification
can damage the measuring system (e.g. water if it falls below the freezing
point).
2.3 Personnel qualification
WARNING!
Risk of injury should qualification be insufficient!
Improper handling can result in considerable injury and damage to property.
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Skilled personnel
Skilled personnel are understood to be personnel who, based on their technical training,
knowledge of measurement and control technology and on their experience and knowledge
of country-specific regulations, current standards and directives, are capable of carrying out
the work described and independently recognising potential hazards.
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The activities described in these operating instructions may only be carried
out by skilled personnel who have the qualifications described below.
WIKA operating instructions pressure gauge, model 4 per ATEX