Heinrichs Messtechnik GmbH
Page 108 of 118
OPERATING MANUAL TMU-W / UMC4
8.2
UMC4 transmitter error messages
The integrated UMC4 transmitter distinguishes between two types of errors. Self-test errors such as
problems with a sensor line or inconsistent parameter inputs are displayed as text error messages. Once the
error has been eliminated, the message automatically disappears from the display. For further information,
see Section 8.2.3.1, “Display of self-test errors”.
Errors that are attributable to system memory or software, division by zero, or a fault in the electronics unit
are designated as system errors. These error messages are not reset automatically after the error (usually of
very brief duration) is eliminated. Before resetting a system error manually, we advise that you contact our
technical service department. For further information, see Section 8.2.3.2, “Display of system error”.
If the cause of any of the error messages described below cannot be eliminated, contact the device vendor.
Standard operating mode
The transmitter operates as described above. After the cause of the error message has been eliminated, the
message automatically disappears. The self-test for monitoring the excitation current can be activated or
deactivated via the “Sensor test” function.
Custody transfer mode
When the device is placed in Custody transfer mode, any errors will remain on the display until the error itself
has disappeared or until the error is acknowledged via the “Enter” button.
All error occurrences and parameters amended whilst in Custody Transfer Mode are logged in an Audit log file,
which can be requested via HART
®
.
