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Pulscon LTC
Trouble-shooting
15.1
Instrument does
not respond
Yes
Values on display
invissible
No
Yes
Output current
< 3.6 mA ? (2 wire)
< 2.4 mA ? (4 wire)
HART
Yes
communication
does not
function
Communication
Yes
PA does not
function
Communication
Yes
via Service adapter
does not function
Instrument
Yes
measures
incorrectly
Trouble-shooting instructions
Check voltage and
Not ok
compare it with the
Connect the
specifications on the
correct voltage
nameplate.
ok
Check the polarity
Not ok
Correct the polarity
of the voltage.
ok
Check power connection
Not ok
Connect plug
to electronic board
ok
ok
F
O
+
Contrast:
Not ok
Not ok
Check plug contact
of the display.
ok
Yes
Output current between
The display is possibly defective.
3.6 ... 22mA?
Contact Pepperl+Fuchs service.
No
Not ok
Correct the
Check cabling
cabling
ok
Possibly defective electronics
Contact Pepperl+Fuchs service.
Is the communication
resistor installed
Not ok
Install the fuse
according to the
(see the OM)
OM?
ok
Is the HART modem
Connect the
Not ok
connected according
HART modem
to the OM?
(see the OM)
ok
Is the switch on the
Not ok
HART modem for
Set the switch
selecting HART
correctly
in the correct position?
ok
Not ok
Check cabling +
terminator
ok
Yes
EMC interference?
No
Not ok
Check configuration
Correct configuration
of COM port on PC
Not ok
Check basic setup
Repeat
basic setup
ok
Proceed according
to section
Trouble shooting in OM
Instrument works?
No
Instrument works?
No
Instrument works?
No
Connect the plug
Display works?
correctly
No
Current is ok?
No
Communication ok?
No
Communication ok?
No
Communication ok
No
Correct cabling +
Communication ok?
terminator
No
Check screening
(see BA section
Communication ok?
Connection)
No
Communication ok?
No
Measurement ok?
No
Yes
Ready
Yes
Ready
Yes
Ready
Ready
Yes
Ready
Yes
Ready
Yes
Ready
Yes
Ready
Yes
?
Ready
Contact Pepperl+Fuchs service.
Yes
Ready
Yes
Ready
Contact Pepperl+Fuchs service.
Yes
Ready
Contact Pepperl+Fuchs service.
Yes
Ready
71
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