6
OPERATION
116
IFC 300
www.krohne.com
06/2009 - 4000069802 - MA IFC 300 R03 en
Simulation of the measured values
S field coil broken
Field coil resistance too high.
Check field coil connections to the
electronic module (for remote versions:
field current cable) for open circuit / short
circuit
S field coil bridged
Field coil resistance too low.
S field current deviation
Measured field current not equal to the
calibrated value. Check calibration.
Measured values are still supplied. No
message if coil broken or bridged.
Check field current connections. If OK:
defective, replace electronic unit.
S field frequency too high
The ratio of the two measuring windows is
not equal to 1, the magnetic field is not
properly in steady state. Measured values
are still supplied.
If Fct. C1.1.14 settling time is set to
"manual", increase value in Fct. C1.1.15.
If "standard" is set, set field frequency in
Fct. C1.1.13 acc. to measuring sensor
nameplate.
S electronic temperature
Upper limit for the permissible electronic
temperature has been exceeded.
Ambient temperature too high, direct solar
radiation or, for C version, process
temperature too high.
S coil temperature
Upper limit for the permissible coil
temperature has been exceeded. No
message if coil broken/bridged.
Process and ambient temperature too high.
S overflow counter 1
This is counter 1 or FB2 (with Profibus).
Counter has overrun and started again at
zero.
S overflow counter 2
This is counter 2 or FB3 (with Profibus).
Counter has overrun and started again at
zero.
S overflow counter 3
This is counter 3 or FB4 (with Profibus). Not
available without IO2. Counter has overrun
and started again at zero.
S backplane invalid
The data record on the backplane is invalid.
The CRC check has revealed a fault.
No data can be loaded from the backplane
when the electronics are replaced. Replace
housing.
S error current A
Error current at current input
S error current B
Messages on the display Description
Actions
Status: C _ _ _ _ _
Output values partially simulated or
fixed
Maintenance required.
C checks in progress
Test mode of the device. Measured values
are possibly simulated values or values with
fixed settings.
Message depending on the situation via
HART
®
or FDT. Depiction via display if
outputs are held by control input or set to
zero.
C test sensor
Test function of the measuring sensor
electronics is active.
C simulation fieldbus
Values on the Foundation Fieldbus interface
are simulated.
Messages on the display Description
Actions
Status: S _ _ _ _ _
Out of specification, measurement
continues, accuracy possibly less.
Maintenance required.
.book Page 116 Wednesday, June 10, 2009 4:20 PM
