8 | Maintenance
154
D-R 290
WARNING
Health hazard due to hot and/or toxic gases in the duct!
When a duct access port (such as a welded-in tube) is opened, pressurised gases
may escape.
▶ Always wear suitable protective equipment (such as a face mask, heat-resistant
gloves and clothing, protective breathing equipment).
▶ The applicable specifications safety regulations and the operating company work
ing instructions for the plant must be complied with.
WARNING
Risk of injury due to crushing and abrasion!
Do not insert fingers into the closing area of the fail-safe shutter. Before maintenance
work, disconnect terminals 16 and 17 in the DSK AE control electronics. To do this,
unplug the connection plug at the measuring head for the fail-safe shutter. (When
disconnected, the fail-safe shutter is closed).
WARNING
Danger of injury due to insufficient skills!
Incorrect use can result in serious personal injury and material damage.
Only ever have work performed by suitably qualified specialised personnel! Ensure
compliance with the skills and knowledge described in section 2.4.1 Personnel, skills
[} 22].
WARNING
Risk of injury due to incorrect spare parts!
Incorrect or defective spare parts can lead to damage, malfunctions or total failure and
may also impair safety.
▶ Only use genuine spare parts supplied by the manufacturer.
▶ Spare parts can be obtained from an authorised agent or directly from the manu
facturer.
NOTICE
Damage to electronic components due to electrostatic discharge (ESD)
Electronic components are becoming ever smaller and more complex. Their
susceptibility to damage from electrostatic discharge is increased accordingly. To
protect these components, measures must be undertaken to prevent electrostatic
discharge during all work performed on the open device (ESD protection).
To prevent the human body becoming charged with static electricity, service
employees can for example be equipped with a personal earthing system.
Maintenance work
The
D‑R 290 is a low maintenance measuring system whose maintenance intervals
depend on the installed system and must be specified by the operating company.
They depend on:
● the type of the medium being measured
● the pressure relationships
8.2
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