Troubleshooting
9.2 Application Problems
SITRANS F M TRANSMAG 2
Operating Instructions, 11/2009, A5E00102775-07
67
Error
Diagnosis
Remedy
For mass measurement: medium density
set incorrectly
Correct density according to current medium
(menu 3.1.4)
Hydraulic calibration values faulty
Check hydraulic calibration values CFH and
ZPH. According to the sensor rating plate and
correct if necessary (menus 6.7.2 and 6.7.3).
Electric calibration faulty
Run self-test (menu 2.4.1);
Check device status (menu 2.1): if "Calibration
failure measuring module" is displayed, send in
the complete electronics for repair
Application-dependent calibration values
faulty
Reset zero point correction (menu 6.6.1) to 0
and/or reset calibration factor (menu 6.7.1) to
1.0.
Alternatively: Make zero correction (menu 6.6.2)
and manual adaptation of the calibration factor
(menu 6.7.1)
Set attenuation too high
Reduce filter time constant (menu 3.1.7.1)
Fault blanking activated
Deactivate noise suppression (menu 3.1.7.3)
Magnetic field frequency too low
Device may not be suitable for this application
Measured value too low at
dosing
Magnetic field frequency too low
Change excitation to Bipolar (menu 6.7.4)
Temporary exceeding of internal working
range
Increase URV (menu 3.1.2)
Measured value too low in
pulsed flow
Unfavorable hydraulic conditions
Install sensor on the suction side of the
corresponding pump or in front of the feeding
valve
Unfavorable hydraulic conditions
Change excitation to Bipolar (menu 6.7.4)
There is a fault, failure signal 3.6, 22 or 24
mA is output (depending on the setting
under menu 4.1.2)
Determine source of fault under device status
(menu 2.1)
Load too high
Reduce total load including the resistance to <
600 Ω
Output current does not
correspond to the current
flow and remains at a
constant value
Current output or power supply defective Replace complete electronics
Communication via HART
not possible
Minimum load of 230 Ω not available
Increase load to at least 230 Ω and connect
HART Modem/Communicator parallel to this
load
Device address set incorrectly (assigned
more than once on the same bus or not
configured in the master)
Correct address under menu 4.1.1 or request
and correct by acyclic communication
Current load on bus too high for
connected feeding device
Try disconnecting other devices from the bus
Adapt the feeding device if necessary
Baud rate between master and
coupler/link not correct
Adapt baud rate to coupler/link
More than two bus terminations exist (incl.
coupler and link)
Reduce to two bus terminations
Communication via
PROFIBUS not possible
PROFIBUS interface defective
Check device status (menu 2.1): if "COM
module failure" is signaled, replace the
complete electronics