Endress+Hauser Promag 400 Index C Einbauanleitung Seite 2

Replacing the electronics
Overview of the personnel authorized to carry out repair
Authorization to carry out a repair depends on the approval of the measuring device. The table shows the respective group of persons
for each.
NOTICE
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 (for Ex. IECEx, ATEX, CSA)
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.
• 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.
• The measuring device is energized. Danger: Risk of electric
shock! Open the measuring device in a de-energized state 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.
• 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
• Follow the Operating Instructions for the device.
• Risk of damaging electronic components! Ensure you have 
a working environment protected from electrostatic discharge.
Tool List
3 mm T 20
2
PH2 flat pliers
Group of persons authorized to carry outrepair
• 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.
• 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.
• 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 conversion 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 E+H service
organization.
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Endress + Hauser