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5. Commissioning, operation
5. Commissioning, operation
Personnel: Skilled personnel
Protective equipment: Safety goggles, protective gloves
Tools: Open-ended spanner
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable or
toxic substances), harmful media (e.g. corrosive, toxic, carcinogenic, radio-
active), and also with refrigeration plants or compressors, there is a danger
of physical injuries and damage to property and the environment.
Aggressive media with extremely high temperatures and under high
pressure or vacuum may be present at the instrument. In the event of failu-
re, components can be ejected or media exhausted under high pressure.
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For these media, in addition to all standard regulations, the appropriate
existing codes or regulations must also be followed.
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Wear the requisite protective equipment (see chapter 3.5 "Personal
protective equipment").
5.1 Requirements for the installation location
For internal and external operation. Protect the instrument from direct sunlight.
5.2 Mechanical connection
Follow the general technical regulations for pressure measuring instruments (e.g.
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EN 837-2 "Selection and installation recommendations for pressure gauges").
It must be ensured that the process connection of the system is not pressurised
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during fitting and dismounting of the pressure gauge.
If the pressure gauge is mounted lower than the pressure tapping point, the
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measuring line must be cleaned thoroughly before connection in order to clear out
any foreign matter. Before fitting, all measuring lines must be dry.
When screwing the instruments in, the force required for sealing must not be applied
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through the case, but only through the spanner flats provided for this purpose at the
connection shank, and using a suitable tool.
Installation with open-ended spanner Sealing of the process connection
WIKA operating instructions models PG81 and PG91
Spanner flats
Sealing face
EN
Sealing in the
thread
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