Endress+Hauser Micropilot FMR51, Operating Instructions Manual

Page: 95 / 198

Micropilot FMR51, FMR52 FOUNDATION Fieldbus Diagnostics and troubleshooting
Hauser 95
13 Diagnostics and troubleshooting
13.1 General trouble shooting
13.1.1 General errors
Error Possible cause Remedial action
Device does not respond. Supply voltage not connected. Connect the correct voltage.
The cables do not contact the
terminals properly. Ensure electrical contact between the
cable and the terminal.
Values on the display
invisible Contrast setting is too weak or too
strong. • Increase contrast by pressing  and
 simultaneously.
• Decrease contrast by pressing  and
 simultaneously.
The plug of the display cable is not
connected correctly. Connect the plut correctly.
Display is defective. Replace display.
"Communication error" is
indicated on the display when
starting the device or
connecting the display Electromagnetic interference Check grounding of the device.
Broken display cable or display plug. Exchange display.
CDI communication does not
work. Wrong setting of the COM port on
the computer. Check the setting of the COM port on
the computer and change it if necessary.
Device measures incorrectly. Parametrization error Check and adjust parameterization.
13.1.2 Parametrization errors
Error Possible cause Remdy
Measured value incorrect If measured distance (Setup
→ Distance) matches the real
distance:
Calibration error • Check and adjust
Empty calibration parameter
(→  127) if necessary.
• Check and adjust Full calibration
parameter (→  128) if necessary.
• Check and adjust linearization if
necessary ( Linearization submenu
(→  144)).
For measurements in bypasses /
stilling well:
• Wrong tank type
• Wrong tube diameter • Select Tank type (→  126) =
Bypass / pipe .
• Enter correct diamter in Tube
diameter parameter (→  127).
Enter correct diamter in Enter correct value in Level correction
parameter (→  141).
If measured distance (Setup
→ Distance) does not match the real
distance:
Interference echo Carry out tank mapping ( Confirm
distance parameter (→  130)).
No change of measured value
on filling / emptying Interference echo from installations,
nozzle or build-up on the antenna. • Carry out tank mapping ( Confirm
distance parameter (→  130)).
• If necessary, clean antenna
• If necessary, selet better mopunting
position