KROHNE MFC 300 EN - Manual (Page 74)

6
OPERATION
74
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
6.2 Zero calibration (menu C1.1.1)
Following installation, perform zero calibration prior to commissioning the device. Finalise the
installation before performing zero calibration. Changes (pipe system or calibration factor) made
after the zero calibration may affect the accuracy, making it necessary to perform zero
calibration again.
Observe the following for reliable zero calibration:
• The measuring sensor should be completely filled with the product at the expected process
pressure and temperature.
• The product may contain no air or gas, especially when it comes to horizontal installations.
Prior to zero calibration, it is recommended that the product be flushed at a high flow rate
(>50%), for 2 minutes.
• After flushing, re-establish zero flow by closing off the corresponding valves.
Set zero calibration automatically or manually using the operating controls. The converter cover
must be installed on the display for automatic calibration.
A) Automatic 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
↓ Calibrate Zero?
Automatic
^ Please wait countdown from 40 s
Zero Calibration
+XX.XXX%
Display of measured zero calibration
in %.
(Warning, value can be changed!)
5 x ^ Save Configuration?
Yes
^ Display page
.book Page 74 Monday, February 6, 2012 11:01 AM