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If the user selects Operation
Status from the Diagnostics
screen, he is able to view all
of the status bits indicating
the health of the transmitter
operation. If the entry is labeled
OFF, that means that the entry is
in normal operating conditions.
If the entry is labeled ON, that
means that the transmitter
diagnostics has detected an
abnormal condition and the user
needs to take corrective action.
The user is able to scroll down
through the list to check each
status bit. In the example given,
the transmitter diagnostics has
detected a problem with the Level
measurement that may require
user intervention. If the transmitter
is not configured for Interface or
Temperature, those status bits will
always be listed as OFF. To return
to the Diagnostics screen, the user
must press EXIT.
If the user selects Cal Status from
the Diagnostics screen, he is
able to view all of the status bits
related to the calibration of the
transmitter. User calibration is
required for Level, Temperature
and DAC output. If the transmitter
diagnostics detects a calibration
constant out of range, this will be
reported by one of the status bits
being set ON.
The user is able to scroll down
through the list to check each
status bit. In the example given,
the diagnostics has detected that
the Level Gain constant is out
of range. The user should then
correct this problem by trimming
the Level Sensor as discussed
below for the Calibration selection.
To return to the Diagnostics
screen, the user must press EXIT.
If the user selects View status
from the Diagnostics screen, the
HART Communicator will send
a command to the transmitter to
report all of the conditions that
are not normal. Any status items
not reported are within the normal
range of operation or calibration.
The HART Communicator issues
a command to receive the results
of the transmitter diagnostics.
During this process, the HART
Communicator will ask the user to
wait until the results are available.
Then the HART Communicator
will report the results to the user
in sequence. In the example
given here, the diagnostics has
detected a problem with the Level
measurement that may require
user intervention. The user must
acknowledge this problem by
pressing OK to continue with the
status.
Also in the example given, the
diagnostics has detected that
the Level Gain constant is out
of range. The user should then
correct this problem by trimming
the Level Sensor as discussed
below in the Calibration selection.
The user must acknowledge
this problem by pressing OK to
continue with the status.
When the HART Communicator
has completed the list of
ON status bits, it reports the
completion of the transmitter
status. The user must
acknowledge the end of the list
by pressing OK to return to the
Diagnostics screen.
Two of the Operation status bits
(Level Maintenance Needed and
Interface Maintenance Needed)
when set by the transmitter
diagnostics will remain set
including power cycles until
reset by the user. After the user
has corrected the maintenance
problems, these status bits should
be reset by accessing the Reset
Maintenance procedure.
When the user selects the
Reset Maintenance option, the
HART Communicator displays
the warning message that the
loop should be removed from
automatic control during this
procedure.
The HART Communicator then
asks the user to select YES
or NO for the procedure to
continue. As shown here, the
user selects YES to continue.
Then the HART Communicator
sends the command to reset the
maintenance needed status bits.
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