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6.3
Maintenance and repair work
Impermissible repair of explosion protected devices
Risk of explosion in hazardous areas
● Repair must be carried out by Siemens authorized personnel only.
Maintenance during continued operation in a hazardous area
There is a risk of explosion when carrying out repairs and maintenance on the device in a
hazardous area.
● Isolate the device from power.
- or -
● Ensure that the atmosphere is explosion-free (hot work permit).
Impermissible accessories and spare parts
Risk of explosion in areas subject to explosion hazard.
● Only use original accessories or original spare parts.
● Observe all relevant installation and safety instructions described in the instructions for the
6.3.1
Enclosure open
Enclosure open
Risk of explosion in hazardous areas as a result of hot components and/or charged capacitors
inside the device.
To open the device in a hazardous area:
1. Isolate the device from power.
2. Visually inspect sensor inlet and outlet.
Exception: Devices exclusively having Intrinsic safety (Ex i) may be opened in an energized
state in hazardous areas.
SITRANS FC410
Compact Operating Instructions, 05/2020, A5E39942309-AB
WARNING
WARNING
WARNING
device or enclosed with the accessory or spare part.
WARNING
Service and maintenance
6.3 Maintenance and repair work
37
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