AT600 User’s Manual 73
Chapter 4. Error Codes and Troubleshooting
Chapter 4. Error Codes and Troubleshooting
4.1 Error Display in the User Interface
The bottom line of the LCD displays a single, top priority error message during operation. This line, called the Error
Line, includes two parts: Error header and Error String. The Error header indicates the error pattern and error number,
while the Error string gives a detailed description of the error information.
4.1.1 Error Header
4.1.2 Flow Error String
Flow errors are errors in the course of making a flow measurement. These errors can be caused by disturbances in the
fluid, such as excessive particles in the flow stream or extreme temperature gradients. The errors could also be caused
by an empty pipe or other such issue with the fluid itself. Flow errors are typically not caused by a malfunction of the
flow measurement device, but by an issue with the fluid itself.
4.1.2a E1: Low Signal
Problem: Poor ultrasonic signal strength or the signal exceeds the limit via the Program;
Cause: When SNR is less that the value of “Signal Low Limits” or the signal cannot be found when the flow is
started, the Low Signal error will occur. Poor signal strength may be caused by a defective cable, a flowcell
problem, a defective transducer or a problem in electronic console. A signal that exceeds the programmed
limits is probably caused by the entry of an improper value in the menu Program Advanced Error
Limits
Signal Low limits.
Action: Check the components listed above (Refer to Diagnostics). Also check the inputted value in the menu
Program Advanced Error Limits
Signal Low limits.
4.1.2b E2: Sound Speed Error
Problem: The sound speed exceeds the limits programmed in the menu: Program Advanced Error Limits
SNSD +- limits.
Cause: When the measured sound speed is out of the limit of sound speed, it will cause this error. The error may be
caused by incorrect programming, poor flow conditions and poor transducer orientation;
Action: Correct the programming errors. Refer to Diagnostics, to correct the flowcell and/or transducer problems.
Also check the inputted value in the menu Program Advanced Error Limits
SNSD +- limits.
Error Pattern Error Header
Flow Error En (n is error number)
Device Error Dn (n is error number)
Warning Sn (n is error number)
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