KROHNE OPTIMASS with MFC 300 EN - Manual (Page 120)

120
B) Manual Adjustment
Under certain conditions, it may not be possible to adjust the zero point. These can include sit-
uations where:
• The medium is in motion because the shut-off valves etc. are not functioning properly.
• There are still gaseous inclusions in the primary head because it was flushed insufficiently.
In such cases the zero point adjustment will not be accepted!
Certain media might make it difficult to set the zero point. In such cases, certain solutions will
resolve the problem and allow zero point adjustment:
It may also be necessary to make a manual zero calibration.
Media Possible Solution
Media which tends to vaporise or degas. Keep the media under higher pressure.
Two-phase media (slurry) consisting of solid
components that can be separated. Fill the primary head with the carrier medium
only.
Two-phase media where the solid or gaseous
components cannot be separated. Fill the measuring system with a substitute
liquid (e.g. water)
Key Text Displayed Description
>
A Quick Setup Countdown from 2.5 s to 0.0 s, then release key
C Setup
> > >
C1.1.1 Zero Calibration
> Calibrate Zero?
Break
Calibrate Zero?
Zero Calibration
+XX.XXX%
Displays zero value in %
Note: Care MUST be taken as the value can be
edited!
g
x 5
Save Configuration?
Yes
Accept Zero
g
Measuring Page
Manual
Yes
Break