GE UTX878 Ultrasonic, User Manual

Page: 67 / 103

Error Codes and Diagnostics 6-1
March 2004
Introduction
The Model UTX878 flow transmitter is a reliable, easy to maintain
instrument. When properly installed and operated, as described in
Chapter 1,
Installation , the meter provides accurate flow rate
measurements with minimal user intervention. However, if a problem
should arise with the electronics enclosure or transducers, this chapter
explains how to troubleshoot the Model UTX878. Indications of a
possible problem include:
•
display of an error message on the LCD screen
•
erratic flow readings
•
readings of doubtful accuracy (i.e., readings that are not consistent
with readings from another flow measuring device connected to
the same process).
If any of the above conditions occurs, proceed with the instructions
presented in this chapter.
Error Codes
If a problem occurs with the electronics or transducers, a built-in error
code message system greatly simplifies the troubleshooting process.
All of the possible UTX878 error code messages are discussed in this
chapter, along with the possible causes and the recommended actions.
When an error code is generated, it will appear in the lower right
corner of the LCD screen, as discussed in Chapter 3.
If an error message appears on the display screen during operation of
the Model UTX878, refer to the appropriate section of this chapter for
instructions on how to proceed.
E0: No Error
Problem:
No error condition currently exists.
Cause:
This message appears briefly to confirm that the response
to another error message has corrected the problem.
Action:
No action is required.
E1: Low Signal
Problem:
Poor ultrasonic signal strength or the signal exceeds the
limits entered via the
User Program .
Cause: Poor signal strength may be caused by a defective cable,
a flowcell problem, a defective transducer or a 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 .
Action:
Using the procedures in Chapter 1, check the components
listed above. Also, check the value entered into the
Signal Strength
Error Limits option, as described on page
2-19.