GE DigitalFlow GS868, Service Manual

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Chapter 2. Error Codes and Screen Messages
18 DigitalFlow™ GS868 Service Manual
2.2 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.
2.3 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
SETUP-SIGNL
submenu of the User Program .
Action:
Using the procedures in Chapter 3, Diagnostics , check the components listed above. Also, check the value
entered into the
SETUP-SIGNL
submenu in Chapter 1, Programming Site Data , of the Programming Manual .
2.4 E2: Sound Speed Error
Problem:
The sound speed exceeds the limits programmed in the
SETUP-SIGNL
submenu of the User Program .
Cause:
The error may be caused by incorrect programming, poor flow conditions or poor transducer orientation.
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.
2.5 E3: Velocity Range
Problem:
The velocity exceeds the limits programmed in the
SETUP
submenu of the User Program .
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 ±75 ft/sec (±23 m/sec) of the programmed limits. See the
Programming Manual for details. Refer to Chapter 3, Diagnostics , to correct any flowcell and/or
transducer problems.