KROHNE MFC 300 EN - Manual (Page 120)

6
OPERATION
120
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
6.8 Diagnostic functions
The following diagnostic functions are available in test menu B2.
6.8.1 Temperature (menu B2.6)
Temperature display in °C or °F. This value should be steadily displayed.
6.8.2 Strain (menu B2.7 strain MT / B2.8 strain IC)
Resistance of strain gauge (strain) in ohms. For value range refer to Driver or sensor coil fault on
page 125.
If strain values fluctuate greatly even after setting a relatively constant temperature, the strain
gauge may have detached itself as a result of constant use of the device at excessive
temperatures (Contact the manufacturer's service department).
6.8.3 Frequency (menu B2.9)
• Fluctuation in the first decimal places indicate gas or air bubbles in the product.
• Worn or eroded measuring tube: frequency increases by around 2…4 Hz; recalibration
required.
• A build-up of deposits can also change the vibration frequency.
• Large fluctuations in frequency occur in the "start-up" phase.
6.8.4 Drive level (menu B2.10)
Display of the drive energy in percent.
Typical values for drive energy in water and with no gas inclusions
OPTIMASS 1000 All sizes 0...6
OPTIMASS 2000 All sizes 0...5
OPTIMASS 3000 All sizes 0...5
OPTIMASS 7000 06...40 0...6
50...80 4...10
OPTIMASS 8000 All sizes 0...5
INFORMATION!
Higher values for drive energy can occur when the product contains air or gas bubbles or when
measuring products with high viscosity or density.
.book Page 120 Monday, February 6, 2012 11:01 AM