GE DigitalFlo XGM868i Service Manual page 22

Chapter 2. Error Codes
E0: No Error
Problem: No error condition currently exists.
This message appears briefly to confirm that the response to another error message has corrected the
Cause:
problem.
No action is required.
Action:
E1: Low Signal
Problem: Poor ultrasonic signal strength or the signal exceeds the limits entered via the Keypad Program.
Poor signal strength may be caused by a defective cable, a flowcell problem, a defective transducer or a
Cause:
problem in the electronics console. A signal that exceeds the programmed limits is probably caused by the
entry of an improper value in the Channelx-Set up-Signal submenu of the Keypad Program.
Using the procedures in Chapter 3, Diagnostics, check the components listed above. Also, check the limit
Action:
values entered into the Channelx-Set up-Signal submenu, as described in Chapter 1, Programming Site
Data, of the Programming Manual.
E2: Sound Speed Error
The sound speed exceeds the limits programmed in the Channelx-Set up-Signal submenu of the Keypad
Problem:
Program.
The error may be caused by incorrect programming, poor flow conditions or poor transducer orientation.
Cause:
Compare the measured sound speed to tabulated nominal values for the gas being used and correct any
Action:
programming errors. Refer to Chapter 3, Diagnostics, to correct any flowcell and/or transducer problems.
E3: Velocity Range
The velocity exceeds the limits programmed in the Channelx-Set up-Signal submenu of the Keypad
Problem:
Program.
This error may be caused by the entry of improper programming data or by poor flow conditions and/or
Cause:
excessive turbulence.
Make sure the actual flow rate is within ±75 ft/sec (±23 m/sec). See Chapter 1, Programming Site Data, in
Action:
the Programming Manual for details. Refer to Chapter 3, Diagnostics, to correct any flowcell and/or
transducer problems.
14 DigitalFlow™ XGM868i Service Manual