Replacing Power supply and display
Endress+Hauser 3
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.
• In the case of measuring devices in custody transfer, the custody
transfer status no longer applies once the lead seal has been removed.
• 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.
• 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.
• 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.
• Printed circuit boards for devices in categories II1G, II1D, II 2G,
II 2D, Zone 1 and Class I, Div. 1, Gp. A, B, C, D have a recess
or printed board code. Unauthorized breaking of this coding is not
permitted, as explosion protection will then be invalidated.
• Caution! When replacing amplifier boards, I/O boards or
submodules, ensure compatibility with existing software. The process
for reading out the software revision number is described in the
Operating Instructions (device functions). If the software of the board
is not compatible, it should be updated using an operating software
package (e.g. Field Care). In the event of functional changes, notify
the plant owner/operator.
• 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 E+H service organization.
Tool List
1 Opening Field housing, Stainless Steel housing and replacing the display
Ex. Coding, Ex board
A0011688
Ex. Coding, non-Ex board
A0011689
6 mm, 8 mm 3 mm PH1, PH2 T20
acid-free,
non-hardening
grease
pen/ tool
Ø < 2 mm
(0.08 inch)
a b
A0012025 A0011381