MSA
Appendix: HART Specific Information
ULTIMA X ® Series
108
GB
Command #137: Read Auto Zero Comp Value
Returns the ULTIMA Automatic Zero Compensation value. This value is accumu-
lated by the device when the sensor reading attempts to drift below zero. This value
is used to compensate the actual Zero calibration. The device will attempt to com-
pensate up to 10 counts [display units] before setting the under-range bit.
Command #139: Read Sensor Status message
Returns the ULTIMA X sensor status message. This is a single byte containing hex
codes. This byte is sent from the sensor module to the main processor and passed
to the HART communications processor.
Request Data Bytes
None.
Response Data Bytes
Command #140: Read Swap Delay Status
This command returns the ULTIMA X sensor swap delay status. This is a single
byte containing a 0 if disabled or 1 if enabled. If enabled, the swap delay will hold
off a sensor missing error for 1 minute. This hold-off allows a sensor module to be
swapped out with a calibrated sensor module without triggering a "sensor missing"
alarm and dropping the 4-20 mA to the trouble level.
Request Data Bytes
None.
Response Data Bytes
Byte
Format
Description
0
Enum
Sensor Status message [
Table 13.7]
Byte
Format
Description
0
Enum
Sensor Swap Delay Status [0 - disabled, 1 - enabled]
