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11 Maintenance
▪ Performing cleaning
1
Free the device from rough and lose dirt with a soft brush.
2
Clean the viewing window of the ultrasonic electronics with a moist cloth.
168
11.8 Check the official seal
The official seals must be available and must not be damaged for calibrated
operation.
▪ Perform a visual check of the official seals
1
Check that the official seals are intact and complete in a visual inspection.
The positions of the official seals can be found here:
Chapter 13.7, "Official seal diagram" on page 192
11.9 Decommissioning and disposal
Danger
Mortal danger from disassembly in potentially explosive environment.
If the device is disassembled in a potentially explosive environment for
disposal, resulting sparks may lead to an explosion.
• Disassemble the device only in an explosion-proof area.
Warning
Risk of injury from work carried out incorrectly
During decommissioning and removal work, there is a risk of severe injuries
from components under pressure and highly explosive atmospheres if the sys-
tem has not been correctly disconnected from the gas supply network and the
power supply in advance.
• Before starting work, switch off the device and secure it against being
switched back on.
• Depressurize the device.
• Only specialist personnel are allowed to undertake the decommissioning.
Manual USM GT400 · EN10 · May 2021
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