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Chapter 4. Error Codes
92 Sentinel™ User’s Manual
4.2 Error Descriptions and Actions
If an error message appears on the meter display screen during operation of the Sentinel, refer to the following list of
error descriptions for instructions on how to proceed.
4.2.1 Err 0: 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.
4.2.2 Err 1: Low Signal
Problem: Poor ultrasonic signal strength or the signal exceeds the limits entered in the New Meter Browser setup
(see Chapter 2, Initial Setup ).
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 New Meter Browser information setup (see Chapter 2, Initial Setup ).
Action: Using the procedures in Chapter 5, Diagnostics , check the components listed above. Also, check the
value entered into the New Meter Browser information setup (see Chapter 2, Initial Setup ).
4.2.3 Err 2: Soundspeed Error
Problem: The soundspeed exceeds the limits programmed in the New Meter Browser information setup (see
Chapter 2, Initial Setup ).
Cause: The error may be caused by incorrect programming, poor flow conditions or poor transducer orientation.
Action: Compare the measured soundspeed to tabulated nominal values for the fluid being used and correct
any programming errors. Refer to Chapter 5, Diagnostics , to correct any flowcell and/or transducer
problems.