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FC6x0
System configuration and operation
2. Close valves in front of and after the flow meter and stop the flow.
3. Wait until density, temperature and pressure are stabilized.
4. In case of fluids, compare the density displayed on the SITRANS FC with the fluid
5. In applications with increased process pressure, ensure that the process pressure
6. Perform autozero.
15.3.5 Performing autozero
To ensure ideal measuring results, performance of a second autozero process is
recommended after several days of operation and stabilization of the installation
conditions.
1. Press [SET] switch for 2 seconds to enter [Operation level].
2. Press [▼] switch until the [Maintenance] menu is selected.
3. Press [SET] switch to enter [Device setup].
4. Press [▼] switch until the [Diag/Service] menu is selected.
5. Press [SET] switch to enter [Diag/Service].
6. Press [▼] switch until the [AZ] menu is selected.
7. Press [SET] switch to enter [AZ].
8. Press [SET] switch to enter [Exe].
9. Press [▼] switch until [Exe] is selected.
10. Press [SET] switch.
11. Press [SET] switch to start autozero.
15.4 Advanced settings
Explosion hazard
DANGER
▶ When the housing is opened in hazardous areas, the applicable Explosion Proof
15.4.1 Setting hardware write-protection
The flow meter can be protected from unauthorized access. If the software write-
protection via password is not adequate, an additional hardware write-protection can be
set on the main board of the transmitter. With the write-protection active, the transmitter
display can still be operated, any changes to settings or parameters are not saved and
therefore not effective.
Write-protection can also be activated without removing the display. To do this, remove
the jumper from the write-protection terminal (see Connection terminals).
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density in order to rule out gas accumulations in the measuring tube.
and its unit of measurement are set correctly.
ð Menu [Exe] is preselected.
ð Parameter [Not exe] appears.
ð Parameter [Exe] flashes.
ð Progress bar appears to indicate status of autozero, after completion display
switches to next higher menu level.
Type Manual must be observed, see chapter Operation, maintenance and repair.
A5E52748375-AA, 2023/09
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