Endress+Hauser RIA 450 Manual De Instrucciones página 59

Process display fault messages
Effect
NNNN
" " is shown in
the display
UUUU
" " is shown in
the display
----
" " is shown in
the display
On current
measurement the
bargraph
permanently
indicates over-range.
Unit shows incorrect
values on voltage
measurement
Unit with universal
input board always
indicates incorrect
values on current
measurement.
The integrated loop
power supply is used.
Cause
Cable open circuit monitor.The
connection to the sensor is
brocken when measureing in a
4...20 mA loop, this means the
current signal is below 3.60 mA.
Over range. The signal
connected to the analogue input
is at least >10% over the valid
measurement range. Not valid
for 4...20 mA input.
Faulty signal monitor. The signal
connected to the analogue input
is outside the specified 4...20 mA
signal (3.60...3.85 mA or
20.4...21.0 mA). This is valid
only for the 4...20 mA input
range.
Link between terminals 11 and
13 has not been wired.
Link between terminals 11 and
13 is active.
This must be removed when
measuring voltage.
Link between 14 and 82 has not
been wired.
If a unit with universal input
board (option) and loop power
supply (terminals 81/83) is used
to measure current then an
additional link is required
between terminals 14 and 82.
Process display
Cure
Please check the
sensor connections
Please check the
iput signal.
Please check the
sensor connected
to the input for its
correct functionality.
Link terminals 11
and 13.
Remove the link
between terminals
11 and 13.
Link terminals 14
and 82.
57