Safety instructions
5
4 Safety instructions
• Comply with national regulations governing mounting, electrical installation, commissioning,
maintenance and alteration procedures.
• Requirements with regard to specialized technical staff for the mounting, electrical
installation, commissioning, maintenance and alteration of the measuring devices:
– trained in instrument safety
– familiar with the individual operation conditions of the devices
– for Ex-certified measuring devices: also trained in explosion protection
• The measuring device is energized. Danger: Risk of electric shock! Open the measuring device
in a de-energized state only.
• In the case of Ex-certified measuring devices: Only open in a de-energized state (once a delay
of 10 minutes has elapsed after switching off the power supply) or in environments which do
not have a potentially explosive atmosphere.
• In the case of measuring devices in safety-related applications in accordance with IEC 61508
or IEC 61511: After alteration recommission in accordance with Operating Instructions.
Document the alteration procedure.
• Use genuine parts from Endress+Hauser only.
• Before removing the device: set the process in a safe condition and purge the pipe of
dangerous materials.
• Hot surfaces! Risk of injury! Before commencing work, allow the system and measuring device
to cool down to a touchable temperature.
• Follow the Operating Instructions for the device.
• Risk of damaging electronic components!
Ensure you have a working environment protected from electrostatic discharge.
• Only open housing for a brief period.
Avoid the penetration of foreign bodies, moisture or contaminants.
• Replace defective seal/gaskets with genuine parts from Endress+Hauser only.
• If threads are damaged or defective, the measuring device must be repaired.
• Threads (e.g. of the cover for the electronics and connection compartments) must be
lubricated. Use an acid-free, non-hardening grease if an abrasion resistant dry lubricant
is non-existent.
• If spacing is reduced or the dielectric strength of the measuring device cannot be guaranteed
during alteration work, perform a test on completion of the work (e.g. high-voltage test in
accordance with the manufacturer's instructions).
• Service connector:
– do not connect in potentially explosive atmospheres.
– only connect to Endress+Hauser service devices.
• Observe the instructions for transporting and returning the device outlined in the
Operating Instructions.
• If you have any questions, contact your Endess+Hauser service organization.
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