KROHNE IFC 100 Converter EN - Manual (Page 72)

6
OPERATION
72
IFC 100
www.krohne.com 07/2010 - 4000041004 - MA IFC 100 R04 en
Measurements out of specification
Messages on the display Description Actions
Status: S _ _ _ _ _ Out of specification, measurement
continues, accuracy possibly less. Maintenance required.
S uncertain measurement Device maintenance necessary; measured
values only conditionally usable.
Group message, when errors as described
below or other influences occur.
S empty pipe 1 or 2 measuring electrodes are not in
contact with the medium; measured value is
not set to zero. Measurement continues.
Filling level of EMF less than 50% or
electrodes completely insulated. If "0" to be
indicated when pipe is empty, activate in
Fct. C1.3.1 "cond.+empty pipe [F]".
The two empty pipe messages cannot appear at the same time. The difference lies in
whether the measured value is also set to zero upon the detection of an empty pipe. The
sensor electronics will use one or the other function (setting to zero or further
measurement) depending on a selection made by the user.
S electrode noise Noise on the electrodes too high. Measured
values are still supplied. No message if
empty pipe.
a) Electrodes extremely soiled;
b) Conductivity too low: activate noise or
pulse filter Fct. C1.2.4, C1.2.7;
c) Gas bubbles, solids or chem. reactions in
medium: activate noise or pulse filter Fct.
C1.2.4, C1.2.7;
d) Electrode corrosion (if message also
appears when flow is zero): use sensor with
suitable electrode material.
S gain error Preamplifier not equal to the calibrated
value; check calibration. Measured values
are still supplied.
Defective, replace electronic unit.
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 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 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 replacing electronics. Save the data to
the backplane again (Service).
.book Page 72 Friday, July 9, 2010 12:29 PM