KROHNE MFC 400 EN - Manual (Page 113)

OPERATION
6
113
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
6.7 Function tests and troubleshooting
Min. and max. recorded temperature (menu C1.5.1 / C1.5.2) Min. and max. recorded temperature (menu C1.5.1 / C1.5.2) Min. and max. recorded temperature (menu C1.5.1 / C1.5.2) Min. and max. recorded temperature (menu C1.5.1 / C1.5.2)
Stores the minimum and maximum value for the temperature occurring during sensor operating
time.
Application problems that may indicate errors in the signal converter:
• An improperly closed shut-off valve during zero calibration results in high calibration values
• Air/gas bubbles result in high energy levels and high calibration values
• Product deposits on the inside of the measuring tube lead to higher/lower density indications
and high calibration values
Common errors (with corresponding symptoms):
• Slightly eroded or corroded measuring tube
- Erroneous density measurement
- High frequency
- Measurement error at low mass flow
• Eroded or corroded measuring tube (product in the housing)
- Measuring tube does not start
- Low resistance to earth with conducting product
• Open circuits of drive and sensor coils or resistance thermometers (RTD)
- Can be measured with ohmmeter
Measuring sensor type Operating temperature
Minimum Maximum
OPTIMASS 6000 - Standard
version
-70°C / -94°F +230°C / +446°F
OPTIMASS 6000 - Cryogenic
version
-200°C / -328°F +40°C / +104°F
OPTIMASS 6000 - High
temperature version
-50°C / -58°F +400°C / +752°F
OPTIMASS 6000 - Hastelloy C -70°C / -94°F +230°C / +446°F
OPTIMASS 6000 - Duplex -50°C / -58°F +230°C / +446°F
.book Page 113 Monday, August 26, 2013 9:05 AM