Authorized Personnel; Safety Instructions - Endress+Hauser VU331 Einbauanleitung

EA01241F

Authorized personnel

Authorization to carry out a repair depends on the approval of the measuring device. The table shows the respective group of
persons for each.
The person who carries out the repair is responsible for safety during the work, the quality of work completed and safety of
the device after repair.
Approval of the measuring device
Without approval
With approval (e.g. IECEx)
1) 1 = Trained customer technician, 2 = Service technician authorized by Endress+Hauser, 3 = Endress+Hauser (send measuring device back
to manufacturer)

Safety instructions

• Check whether the spare part matches the identification
label on the measuring device, as explained on the first page.
• The spare parts set and Installation Instructions are used to
replace a faulty unit with a functioning unit of the same
type.
Use genuine parts from Endress+Hauser only.
• Comply with national regulations governing mounting,
electrical installation, commissioning, maintenance and
repair procedures.
• Requirements with regard to specialized technical staff for
the mounting, electrical installation, commissioning,
maintenance and repair 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 repair recommission in accordance with Operating
Instructions. Document the repair procedure.
• 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.
2
Group of persons authorized to carry out repairs
1, 2, 3
1, 2, 3
• In the case of measuring devices in custody transfer, the
custody transfer status no longer applies once the lead seal
has been removed.
• Follow the Operating Instructions for the device.
• Risk of damaging electronic components! Ensure you have a
working environment protected from electrostatic discharge.
• After removing the electronics cover, there is a risk of
electric shock as shock protection is removed!
Switch off the measuring device before removing internal
covers.
• Modifications to the measuring device are not permitted.
• 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 repair 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
Endress+Hauser service
1)
organization.
Endress+Hauser