GE CTF878, User & Service Manual

Page: 46 / 72

February 2009
4-2 Troubleshooting
Table 4-1: Error Messages
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 4-4 and Transducer Problems on
page 4-6. 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 4-4 and Transducer
Problems on page 4-6.
Contact factory if problem persists.
E7
Modulation
Overrange
Error
Gas composition.
Power CTF878 down. Open receivers’ GUAL boxes. Discon-
nect 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 cou-
pled 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 Veloc-
ity 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.