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