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• Make sure that the insulation of the cables are intact.
• Make sure that no stripped cable is located outside the housing of the ultra-
sonic electronics and the connection box.
If the device is not installed according to the operating instruction, then there is
not enough explosion protection.
• Install the device according to the operating instruction.
If you do not use the appropriate tool and material, component may be dam-
aged. The explosion protection is void.
• Use tools that have been recommended for the respective work in the operat-
ing instruction.
• Make sure that the performance data of the power connection comply with the
specifications of the type plate.
• Use only an Atex or IECEx certified EMC cable screw connection in the protec-
tion category increased safety with a metric thread (M20x1.5).
• Creepage distances and clearances must be maintained.
• Openings for line feeds not used must be sealed by impact resistant, anti-self-
loosening and twisting safe blind plugs.
• The line insulation must reach to the terminals. When stripping, the conductor
itself must not be damaged.
• When closing the housing, take care that the seals remain effective in order to
ensure for the protection category IP 66 / NEMA 4X.
• Housing cover or housing with damaged thread must be replaced immediately.
• Observe the applicable national guidelines in the individual countries.
• Use cables that match the cable glands.
Gas may represent a risk to life and limb in different ways. Depending on the gas
type, different hazards may have an effect on you with respective consequences.
You may experience intoxication and injuries. There is also a risk of explosion.
• Before working, inform yourself about the media in the system.
• Install the device only when the system is switched off, depressurized and se-
cured.
• Make sure that there is no potentially explosive gas mixture at the installation
location.
The device is exposed to high pressures. If components under pressure are re-
moved / assembled, the high pressure may escape suddenly causing the compo-
nent to fly around. Mortal danger!
5 Safety
Manual USM GT400 · EN10 · May 2021
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