E0: No Error; E1: Low Signal; E2: Soundspeed Error; E3: Velocity Range Error - GE Measurement Sentinel LCT4 User Manual

Chapter 7. Troubleshooting
7.2.1

E0: No Error

No error condition currently exists.
Problem:
This message appears briefly to confirm that the response to another error message has corrected the
Cause:
problem.
No action is required.
Action:
7.2.2

E1: Low Signal

Poor ultrasonic signal strength or the signal exceeds the limits entered via the User Program.
Problem:
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 Error Limits option of the User Program.
Using the procedures in Chapter 1, check the components listed above. Also, check the value entered into
Action:
the Signal Strength Error Limits option, as described in "Entering Error Limits" on page 65.
7.2.3

E2: Soundspeed Error

The soundspeed exceeds the limits programmed in the Error Limits option of the User Program.
Problem:
The error may be caused by incorrect programming, poor flow conditions or poor transducer orientation.
Cause:
Compare the measured soundspeed to tabulated nominal values for the process fluid and correct any
Action:
programming errors. Refer to "Fluid and Pipe Problems" on page 126 and "Transducer Problems" on
page 127 to correct any problems.
7.2.4

E3: Velocity Range Error

The velocity exceeds the limits programmed in the Error Limits option of the User Program.
Problem:
This error may be caused by the entry of improper programming data or by poor flow conditions and/or
Cause:
excessive turbulence.
Action: Make sure the actual flow rate is within the programmed limits. Also, check the value entered into the
Error Limits option, as described on page 65. Refer to "Fluid and Pipe Problems" on page 126 and
"Transducer Problems" on page 127 to correct any problems. If this error persists, and no fluid or pipe
problems appear to exist, consider enabling the Tracking Windows option.
118 Sentinel™ LCT4 User's Manual