64
FEP630, FEH630
ELECTROMAGNETIC FLOWMETER | CI/FEP630/FEH630-EN REV. D
… 7 Operation
… Extended diagnostic functions
Detection of partial filling
A partially filled sensor influences the measured values of the
flow meter as well as the measuring accuracy.
If the flowmeter sensor is ordered with a full pipe detection
electrode located at the top of the flowmeter sensor, the
function ‘...Diagnosis Tfe’ of the transmitter triggers an alarm
when the meter tube goes into partial filling.
Requirements for use:
• Nominal diameter: > DN 50 (> 2 in)
• Flowmeter sensor Design Level A
• Conductivity of the measuring medium:
20 to 20000
ι
S/cm
Installation conditions:
• The flow sensor must be installed horizontally with the
terminal box pointing upwards.
Setup
The partial filling detection must be matched to the measuring
medium on site.
Menu / parameter
Description
Diagnostics / ...Diagnosis Control / ...Diagnosis Tfe
Tfe On/Off
Activate the function.
Start Tfe Adjust
Automatic adjustment of the TFE function.
Prior to starting, make sure that:
• There is no flow
• Sensor is completely filled
Manual Tfe Adjust
Manual adjustment of the TFE function.
Tfe Threshold
Manual fine adjustment of the switching
threshold.
Actual Tfe Value
Display of the current TFE value.
Above the TFE threshold, an alarm occurs, if
configured.
Detection of gas bubbles
Gas bubbles in the measuring medium influence the flow
measurement values and the measuring accuracy.
It is possible to issue a gas bubble alarm if the actual gas bubble
value exceeds the configured threshold.
This alarm message is shown on the display. The digital output
triggers an alarm if configured accordingly.
Requirements for use:
• Nominal diameter DN 10 to DN 300 (
¡
to 12 in).
• Conductivity of the measuring medium:
20 to 20000
ι
S/cm.
Installation conditions:
• The flowmeter sensor can be installed either horizontally
or vertically. Vertical installation is preferable.
Setup
The gas bubble detection must be matched to the measuring
medium on site.
Menu / parameter
Description
Diagnostics / ...Diagnosis Control / ...Diagnosis Gas Bub.
Gas Bubble On/Off
Activate the function.
Start Adj Gas Bubble
Automatic adjustment of the Gas Bubble
Detection function.
Prior to starting, make sure that:
• There is no flow
• Sensor is completely filled and free of gas
bubbles
Gas Bubble Threshold
Manual fine adjustment of the switching
threshold.
