Loop control reminder message
Troubleshooting
Fault indications
Span Fault
This fault can occur if the sensor is in cal mode and the required SPAN
gas is not applied to the sensor at the indicated time or within the
timeout period. The 4-20 mA returns the measured gas value based
upon the last successful calibration parameters. This fault sets several
status flags in the digital output to indicate that an error has occurred.
The current calibration status can be observed by right-clicking on
status group 2 to expand it as shown in FIGURE D-16.
Other possible cause for a Span Fault could be the use of an incorrect
Span gas or improperly set PV Upper Trim point (Span) setting. The
Trim (calibration) point information can be viewed from the sensor trim
points menu as shown in FIGURE D-17.
Figure D-15. Loop Control Reminder message
D-54
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