GE AquaTrans AT868 - E2: Sound Speed Error; E3: Velocity Range; E4: Signal Quality; E5: Amplitude Error

September 2004
5-2 Error Codes
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 (see page 2-13). Refer to Chapter 6,
Diagnostics, to correct any flowcell and/or transducer
problems.
E3: Velocity Range Problem: The velocity exceeds the limits programmed in the
SETUP-SIGNL 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 the programmed
limits. Also, check the value entered into the SETUP-
SIGNL submenu, as described on page 2-13. Refer to
Chapter 6, Diagnostics, to correct any flowcell and/or
transducer problems.
E4: Signal Quality Problem: The signal quality is outside the limits programmed in the
SETUP-SIGNL submenu of the User Program.
Cause: The peak of the upstream or downstream correlation
signals has fallen below the correlation peak limit, as set
in the SETUP-SIGNL submenu. This may be caused by a
flowcell or electrical problem.
Action: Check for sources of electrical interference and verify the
integrity of the electronics console by temporarily
substituting a test flowcell that is known to be good.
Check the transducers and relocate them, if necessary.
See Chapter 6, Diagnostics, for instructions.
E5: Amplitude Error Problem: The signal amplitude exceeds the limits programmed in
the SETUP-SIGNL submenu of the User Program.
Cause: Solid or gas particulates may be present in the flowcell.
Poor coupling for clamp-on transducers.
Action: Refer to Chapter 6, Diagnostics, to correct any flowcell
problems.