9 Maintenance
75
9 Maintenance
9.1 Safety
instructions
WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
CAUTION
Risk of burns due to hot measuring media
The device surface temperature may exceed 70 °C (158 °F),
depending on the measuring medium temperature!
• Before starting work on the device, make sure that it has
cooled sufficiently.
NOTICE
Damage to components!
The electronic components of the printed circuit board can be
damaged by static electricity (observe ESD guidelines).
• Make sure that the static electricity in your body is
discharged before touching electronic components.
Corrective maintenance work may only be performed by trained
personnel.
• Before removing the device, depressurize it along with any
adjacent lines or equipment.
• Check whether hazardous materials have been used as
measuring medium before opening the device. Residual
amounts of hazardous material may still be present in the
device and could escape when it is opened.
Within the scope of operator responsibility, check the following as
part of a regular inspection:
• pressure-carrying walls / pressure equipment liner
• the measurement-related function
• the leak tightness
• the
wear
(corrosion)
9.2 Sensor
The flowmeter sensor is largely maintenance-free.
The following items should be checked annually:
• Ambient conditions (air circulation, humidity).
• Tightness of the process connections.
• Cable entries, cover gaskets and cover screws.
• Operational reliability of power supply, lightning protection
and grounding.
The sensor electrodes must be cleaned when the flow rate
information on the transmitter changes while recording the
identical flow rate volume.
If the display shows a higher flowrate, the contamination is
insulating. If a lower flowrate is displayed, the contamination
results in a short-circuit.
For repairs to the liner, electrodes or magnet coil, the flowmeter
must be returned to the manufacturer.
Returning devices
on page 15
9.2.1
Gaskets
Some device versions are shipped with special gaskets. These
gaskets must be used and installed properly to prevent leakage
and to ensure conformity with 3A standards and EHEDG
requirements.
For all other device versions, use commercially available gaskets
made from a material (rubber, PTFE, It, EPDM, silicone, Viton,
etc.) that is compatible with the prevailing temperature and the
medium being measured and for hygienic “JUMO flowTRANS
MAG H10” devices, use sealing materials that are 3A-compliant.
Wafer-type sensors are installed without gaskets directly in the
piping.
9.3 Cleaning
When cleaning the exterior of meters, make sure that the
cleaning agent used does not corrode the housing surface and
the seals.
To avoid static charge, a damp cloth must be used for cleaning.
Summary of Contents for 406060
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Page 98: ...13 Appendix 98 13 3 Declarations of conformity 13 3 1 JUMO flowTRANS MAG S10...
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Page 104: ...13 Appendix 104 13 3 2 JUMO flowTRANS MAG H10...
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