9 Maintenance
80
9.5.5
Solving a problem with a warning or error message with the orange device status
LED
Device sta-
tus LED
Analog out-
put AO1
Digital outputs
DO1/DO2/DO3
Displayed
message
Meaning
Measure
Orange
4 to 20 mA
Switched
a
PULS.OVF
The value set for
the pulse output is
incorrect (the fre-
quency generated
is > 250 Hz).
•
Select a higher value
for the parameter PU,
see
see
chapter 8.6.7 "Configur
ing the transistor output
DO1 as a pulse output",
page 46
Orange
4 to 20 mA
Switched
NEG.
FLOW
The measured flow
rate is negative
(even though the
value on the display
is positive).
•
Make sure that revers-
ing the direction of flow
does not have a nega-
tive impact on the pro-
cess
•
If it does, mount the de-
vice on the pipeline so
that the arrow on the
side of the housing is
pointing in the direction
of flow
Orange
4 to 20 mA
Switched
WARN.
LOW
The measured flow
rate is below the se-
lected minimum
flow rate.
•
Check the flow rate in
the pipeline and any
potential consequenc-
es
•
If necessary, clean the
sensor and calibrate
the flow rate zero point
This message is
only generated
when flow rate
monitoring is active
(
see
chapter 8.7.5 "Moni
toring the flow rate
in the pipeline",
page 71).
Orange
4 to 20 mA
Switched
WARN.HIG
The measured flow
rate is above the
selected maximum
flow rate.
•
Check the flow rate in
the pipeline and any
potential consequenc-
es
•
If necessary, clean the
sensor and calibrate
the flow rate zero point
This message is
only generated
when flow rate
monitoring is active
(
see
chapter 8.7.5 "Moni
toring the flow rate
in the pipeline",
page 71).