Error Codes - GE DigitalFlow DF868 Service Manual

Chapter 2. Error Codes and Screen Messages

2.2 Error Codes

E0: No Error
Problem:
No error condition currently exists.
Cause:
This message appears briefly to confirm that the response to another error message has corrected the
problem.
Action:
No action is required.
E1: Low Signal
Problem:
Poor ultrasonic signal strength or the signal exceeds the limits entered via the User Program.
Cause:
Poor signal strength may be caused by a defective cable, a flowcell problem, a defective transducer or a
problem in the electronics console. A signal that exceeds the programmed limits is probably caused by the
entry of an improper value in the
Action:
Using the procedures in Chapter 3, Diagnostics, check the components listed above. Also, check the value
programmed into the
1-channel DF868, or page 1-25 for the 2-channel DF868).
E2: Sound Speed Error
Problem:
The sound speed exceeds the limits programmed in the
Cause:
The error may be caused by incorrect programming, poor flow conditions or poor transducer spacing.
Action:
Compare the measured sound speed to tabulated nominal values for the fluid being used and correct any
programming errors. Refer to Chapter 3, Diagnostics, to correct any flowcell and/or transducer problems
(pages 3-5 to 3-8).
E3: Velocity Range
Problem:
The velocity exceeds the limits programmed in the
Cause:
This error may be caused by the entry of improper programming data or by poor flow conditions and/or
excessive turbulence.
Action:
Make sure the actual flow rate is within the programmed limits. See the Programming Manual for details.
Refer to Chapter 3, Diagnostics, to correct any flowcell and/or transducer problems (pages 3-5 to 3-8).
E4: Signal Quality
Problem:
The signal quality is outside the limits programmed in the
Cause:
Too high a signal strength may be caused by the failure of an electronic component. Too low a signal
strength may be caused by a flowcell or electrical problem.
Action:
Check for sources of electrical interference and verify the integrity of the electronics console by
temporarily substituting a test flowcell that is known to be good. Check the transducers and relocate them,
if necessary. See Chapter 3, Diagnostics, for instructions.
16
SETUP SIGNL
SETUP SIGNL
submenu, as described in the Programming Manual (page 1-31 for the
submenu of the User Program.
SETUP SIGNL
submenu of the User Program.
SETUP
submenu of the User Program.
SETUP
submenu of the User Program.
DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Service Manual