Bühler technologies BPM Notice De Montage page 19

BPM
7.1 Troubleshooting
Error Possible cause
Cable not prop-
erly connected.
• Unable to
communicate
via RS232 or
CAN bus.
• Current out- Operating
put < 4 mA. voltage outside
the prescribed
range.
Communication
bus configured
incorrectly
• All size chan- Air inside the oil
nels show
identical val-
ues.
No volume flow
No valid meas-
urement result
• All size chan-
nels show
0/0/0/0.
Dirty measuring
cell
([ ] symbol
flashing in dis-
play)
Measuring cell
failure
([ ] symbol
flashing in dis-
play)
• High laser cur-
rent.
Air inside the oil
• Low photo-
voltage.
BX150102 ◦ 03/2021
Recommended actions
• First check the elec-
trical connection of
the sensor and
verify the data
cable and power
cable are properly
connected.
• Please note the
prescribed pin as-
signment.
• Always operate the
device in ranges
between 9 and
33 VDC.
• Check the configur-
ation in the menu
under "Communic-
ation"
• Increase the oper-
ating pressure to
inside the specified
range.
• Increase the dis-
tance to the next
pump/gearbox/
cylinder.
• Verify the supply
and discharge lines
are installed prop-
erly.
• Increase the oper-
ating pressure to
inside the specified
range.
• Check the configur-
ation and measur-
ing mode.
• Ensure a measure-
ment is started and
completed.
• Clean the device
with clean oil or
solvent (e.g. isopro-
pyl alcohol).
• Flush with clean oil
in the opposite dir-
ection.
• Please contact
Bühler Technolo-
gies GmbH Service.
• Increase the oper-
ating pressure to
inside the specified
range.
Dirty measuring
cell
• The display
Basic system
continuously
malfunction.
shows "no
valid applica-
(All communica-
tion".
tion lines are
• The device
automatically
keeps restart-
disabled.)
ing.
• No serial com- Interface config-
munication. uration incorrect
Incorrect com-
munication port
selected
Incorrect sensor
command syntax
Num Lock key off
Caps Lock is on
(all caps)
Cable connected
incorrectly or de-
fective
Tab. 11: Troubleshooting
• Increase the dis-
tance to the next
pump/gearbox/
cylinder.
• Clean the device
with clean oil or
solvent (e.g. isopro-
pyl alcohol).
Flush with clean oil
in the opposite dir-
ection.
• Please contact
Bühler Technolo-
gies GmbH Service.
• Check and if neces-
sary correct the in-
terface parameter
settings (e.g. 9600,
8.1, N, N).
• Test communica-
tion with a ter-
minal program.
• Check and if neces-
sary correct the se-
lected communica-
tion port (e.g.
COM1).
• Check the syntax of
the sensor com-
mands. Particularly
note capitalisation.
• Turn on the Num
Lock key.
• Turn off the Caps
Lock.
• If possible, use ori-
ginal data cables.
Bühler Technologies GmbH 19