CoriolisMaster FCB400, FCH400 CORIOLIS MASS FLOWMETER  |  CI/FCB400/FCH400-EN REV. H  85 
 
 
9  Maintenance / Repair 
 
Safety instructions 
 
 WARNING 
Loss of Ex-approval! 
Loss of Ex approval due to replacement of components in 
devices for use in potentially explosive atmospheres. 
•  Devices for use in potentially explosive atmospheres may 
be serviced and repaired by qualified ABB personnel only. 
•  For measuring devices for potentially explosive 
atmospheres, observe the relevant operator guidelines. 
 See also Use in potentially explosive atmospheres on 
page 6. 
 
 
 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. 
 
 
Note 
For detailed information on the maintenance of the device, 
consult the associated operating instructions (OI)! 
 
 
 
10 Dismounting and disposal 
 
Dismounting 
 
 WARNING 
Risk of injury due to process conditions. 
The process conditions, for example high pressures and 
temperatures, toxic and aggressive measuring media, can 
give rise to hazards when dismantling the device. 
•  If necessary, wear suited personal protective equipment 
during disassembly. 
•  Before disassembly, make sure that the process 
conditions do not pose any safety risks. 
•  Depressurize and empty the device / piping, allow to cool 
and purge if necessary. 
 
Bear the following points in mind when dismantling the device: 
•  Switch off the power supply. 
•  Disconnect electrical connections. 
•  Allow the device / piping to cool and depressurize and 
empty. Collect any escaping medium and dispose of it in 
accordance with environmental guidelines. 
•  Use suited tools to disassemble the device, taking the 
weight of the device into consideration. 
•  If the device is to be used at another location, the device 
should preferably be packaged in its original packing so 
that it cannot be damaged. 
•  Observe the notices in Returning devices on page 29.