Personnel Qualification - WIKA DMSU21SA Mode D'emploi

3. Safety
2. Mechanically generated sparks
Mechanically generated sparks are a potential ignition source. If the materials used
exceed a total mass percentage of 7.5 % magnesium, titanium and zirconium, the
operator must take appropriate protective measures. The materials used can be found
EN
in the instrument marking.
3. Static electricity
- To avoid electrostatic charging, the diaphragm seal system must be included in the
equipotential bonding of the system. This can be done via the grounding screw at
the process transmitter or other suitable measures.
- The diaphragm seal system can optionally contain non-conductive components
with surface coating/lining or may be marked with SPB (special bonding) or GL
(glueing) due to a special joining process. In such cases, the operator must take
appropriate measures to prevent electrostatic charging. This can, for example, be
done by equipotential bonding at several conductive points before and after the
non-conductive point.
- The operating company must ensure that the selected components of the
diaphragm seal system are suitable for use in hazardous areas. This applies in
particular to non-conductive materials (e.g. plastics).
- Metal components of the diaphragm seal system (e.g. TAG plate) must be included
in the equipotential 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.

3.5 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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The activities described in this document may only be carried out by skilled
personnel who have the qualifications described below.
12 WIKA operating instructions, model DMSU21A