Chapter 4. Error Codes and Troubleshooting74 AT600 User’s Manual4.1.2c E3: Velocity RangeProblem: The velocity exceeds the limits programmed in the menu Program Advanced Error Limits VelocityLow/High;Cause: When the measured velocity is out of the limit of velocity, it will cause this error. The error may be causedby improper programming data, poor flow conditions and/or excessive turbulence;Action: Make sure the actual flow rate is within the programmed limits. Also, check the entered value in the menuProgram Advanced Error Limits Velocity Low/High. Refer to Diagnostics, to correct the flowcelland/or transducer problems.4.1.2d E4: Signal QualityProblem: The signal quality is outside the limits programmed in the menu Program Advanced Error LimitsCorrelation Peak.Cause: The peak of the upstream or downstream correlation signals has fallen below the correlation peak limit, asset in the menu Program Advanced Error Limits Correlation Peak. This may be caused by aflowcell or electrical problem.Action: Check for sources of electrical interference and verify the integrity of the electronics console bytemporarily substituting a test flowcell that is known to be good. Check the transducers and relocate them,if necessary. See Diagnostics, for instructions.4.1.2e E5: Amplitude ErrorProblem: The signal amplitude exceeds the limits programmed in the menu Program Advanced ErrorLimitsAmp Disc Min/Max;.Cause: Solid or liquid particulates may be present in the flowcell. Poor coupling for the clamp-on transducers.Action: Refer to Diagnostics, to correct any flowcell problems.4.1.2f E6: Cycle SkipProblem: The acceleration exceeds the limits programmed in the menu Program Advanced ErrorLimitsAcceleration.Cause: This condition is usually caused by poor flow conditions or improper transducer alignment.Action: Refer to Diagnostics, to correct any flowcell and/or transducer problems.