Burkert 8041 - Page 55

55
Maintenance and troubleshooting
Problem
Bargraph
state
Red LED state
Green LED
state
Current or
frequency
output
state
Meaning / Cause Recommended action
The ow rate
measure-
ments are
not stable
Unstable OFF Flashes once
every second
> 4mA
and
> 0Hz
The electrodes are dirty.
→ Clean the electrodes (see
chapter10.3).
The electrodes are not in
contact with the uid.
→ Make sure the electrodes are
always in contact with the uid
Air bubbles appear in
the uid.
→ Respect the mounting recommen-
dations (see chapter8.2).
→ Select the "slow" lter (see
chapter9.5).
The ow sensor has not
been immersed for 24h
before calibration of the
"ow zero" point.
→ Respect the calibration procedure
(see chapter9.7).
The ow rate uctua-
tions are very important.
→ Select the "slow" lter (see
chapter9.5).
Upstream-downstream
connection has not been
correctly done.
→ Respect the mounting recommen-
dations (see chapter8.2).
The device
transmits no
current or no
frequency at
all.
shows a
value
OFF Flashes once
every second
0mA and/
or 0Hz
The position of the sink/
source selector is not
correct.
→ Correctly position the sink/source
selector (see chapter8.3.1).
The outputs are not cor-
rectly wired.
→ Check the wiring of the outputs
(see chapter8.3.1, 8.3.2, 8.3.3).
The sensor
does not
measure a nil
ow rate.
Lit OFF Flashes once
every second
> 4mA and
> 0Hz
The calibration of the
ow zero point has not
been correctly done.
→ Calibrate again (see chapter9.7).
english
Type 8041