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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