Panametrics CTF878, Service Manual

Page: 42 / 67

Chapter 4.
32 Model CTF878 Service Manual
Error Problem Possible Cause Action
E0 No error
Displays briefly after
display of another
error message
None required.
Measurement is valid.
E1
Receiver
Board
Error
FPGA not loaded, etc.
Power CTF878 down. Remove shroud. Make sure
receiver board is seated correctly and its screws
are on tight. Power up. Contact factory if problem
persists.
E2 DSP Error
Acknowledgement
not received after
program is loaded;
or checksum error.
Power CTF878 down. Remove shroud. Make sure
DSP board is seated correctly and its screws are
on tight. Power up. Contact factory if problem
persists.
E3
DSP
Timeout Error
DSP board not seated
correctly;
or corrupted code.
Power CTF878 down. Remove shroud. Make sure
DSP board is seated correctly and its screws are
on tight. Power up. Contact factory if problem
persists.
E4 Carrier
Underrange
Error
Broken cable.
Pipe/Fluid problem.
Transducer problem.
Electronic failure.
Check transducer cables. See
Pipe/Fluid
Problems on page 34 and Transducer Problems
on page 34. Contact factory if problem persists.
E5
Carrier
Overrange
Error
Gas composition.
Power CTF878 down. Open receivers’ GUAL boxes.
Disconnect preamplifiers from transducers and
from receiving cables. Connect transducers
directly to
receiving cables. Switch preamplifiers’ power
jumper to OFF position. Power up. Contact factory
if problem persists.
E6
Modulation
Underrange
Error
Poor flow conditions
See Pipe/Fluid Problems on page 34 and
Transducer Problems on page 34.
Contact factory if problem persists.
E7
Modulation
Overrange
Error
Gas composition.
Power CTF878 down. Open receivers’ GUAL boxes.
Disconnect preamplifiers from transducers and
from receiving cables. Connect transducers
directly to
receiving cables. Switch preamplifiers’ power
jumper to OFF position. Power up. Contact factory
if problem persists.
E8 SNR Error Poor flow conditions.
Check the programming (transducer, pipe, fluid,
path) and transducer setup. If they are correct
and in
agreement, make sure that the transducers are
well coupled to the pipe. Contact factory if
problem persists.
E9
Velocity
Range Error
Incorrect TAG Path.
Incorrect Velocity
Error
Limits.
Poor flow conditions.
Check TAG Path under Program > Path. Check
Velocity Error Limits under Service > Error Limits.
Contact factory if problem persists.
E10 Acceleration
Error
Incorrect Acceleration
Error Limit.
Poor flow conditions.
Check acceleration error limit under
Service > Error Limits.
Contact factory if problem persists.
Note: When errors E4 through E10 occur consistently, the first action to take is to check the
programming (transducer, pipe, fluid, path) and the transducer setup. If they are correct
and in agreement, make sure that the transducers are well coupled to the pipe.