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Troubleshooting
10.2 Application Problems
10.2
Application Problems
Table 10-1
Troubleshooting list
Error
Sensor does not work or no
display or no output signal
Transmitter does not react to
controls
Transmitter cannot be para‐
meterized by the operating
module
Output signal OK but no dis‐
play visible
Flow display = 0 at available
flow
Transmitter indicates flow at
zero flow
Fluctuating measuring re‐
sults at constant flow
80
Diagnosis
Power supply missing
Device fuse defective
Reflections in the glass
Glass is not tight to the operating unit
Personal code is activated
Local operation lock activated by HART or
PROFIBUS
Ambient temperature outside permissible
range
Display defective
Low flow cut-off set too high
Flow opposite to preferable direction at set‐
ting of measuring direction to "forwards
only"
Measured value set to 0 via digital input
Cable connection to sensor defective (only
for remote design)
SmartPLUG defective
Hydraulic zero point drift, application-de‐
pendent
Grounding problems
Air, gas occlusions
Grounding problems
Vibrations in the sensor and/or in the cable
run
Medium conductivity too low
Proportion of solids too high
Very unstable measurement, strongly fluc‐
tuating values, output going towards zero
Remedy
Connect or switch on power supply
Check device fuse and replace if necessary
Clean glass
Screw in the electronic cover tightly
Enter personal code (menu 6.1 or deactivate by
entering 0 in menu 6.2)
Cancel operation lock
Remote design: bring transmitter into a tempera‐
ture range of 0 to 50 °C
Change operating module
Reduce low flow cut (menu 3.1.6)
Switch over preferred direction menu (3.1.5.1) or
set measuring direction to "forw.+rev." (menu
3.1.5.2)
Switch over signal at digital input (menu 4.3.2) or
switch off function (menu 3.3.1)
Check cable connection and exchange as required
Have SmartPLUG exchanged (only by service per‐
sonnel)
Perform zero correction (menu 6.6.2) or enter
correction value directly (menu 6.6.1)
Provide potential equalization (see Installation
with grounding rings (Page 28))
Eliminate gas occlusions or use gas trap
Provide potential equalization (see Installation
with grounding rings (Page 28))
Fix the sensor better, strap cables
Check conductivity; measuring method may be
unsuitable
Reduce proportion of solids, measuring method
may be unsuitable
Check for moisture in SmartPlug
If fitted with round SmartPlug call factory product
support
TRANSMAG 2 with MAG 911/E
Operating Instructions, 03/2021, A5E00102775-AC
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