KROHNE MFC 300 EN - Manual (Page 75)

OPERATION
6
75
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
B) Manual calibration
Under certain conditions, zero calibration is not possible and will be cancelled:
• The product is still flowing. The shut-off valves are not closed tightly enough.
• There are still gas bubbles in the fluid.
Remedy: Flush sensor and repeat calibration
With some media, it may be difficult to perform zero calibration. In such cases, there are various
methods to still achieve good zero calibration:
Key Display Description and setting
> A Quick Setup Press and hold for 2.5 s, then release
the key.
2 x ↓ C Setup
3 x > C1.1.1 Zero Calibration
> Calibrate Zero?
Break
3 x ↓ Calibrate Zero?
Manual
Zero Calibration
+XX.XXX%
Display currently stored zero
calibration in %.
(Warning, value can be changed!)
Possible manual entry of zero
calibration.
Storing the displayed zero
calibration.
5 x ^ Save Configuration?
Yes
^ Display page
Medium Possible solutions
Media that tend to evaporate or outgas Increase pressure.
Two-phase media (slurries), that contain solids that
may fall out.
Only fill the sensor with the carrier medium.
Two-phase media in which the solids or gas-
forming components cannot be separated.
Fill sensor with another liquid, e.g. water.
.book Page 75 Monday, February 6, 2012 11:01 AM