Page 90
ST 800 Series HART/DE Option User’s Manual
Revision 5.0
Status Type
Device Status
(HART Command
48)
Details/Resolutions
(continued)
Non critical status
(Warning)
Low Supply Voltage
Possible causes:
The supply voltage to the transmitter terminals is too
low or the supply voltage to the Sensor board is too
low.
Resolution:
Check that the power supply and loop resistance are
within specification. If possible, try to increase the
voltage level of the supply. If supply voltage and loop
resistance are adequate and the problem persists,
replace the Electronics Module. If the problem still
persists, replace the Meter Body.
No DAC Calibration
Possible causes:
No DAC calibration has been performed on the
device.
Resolution:
Perform DAC calibration for precise analog output
measurement.
Tamper Alarm
Possible causes:
Device is in Write Protect Mode and Tamper Mode is
enabled, or Tamper Alarm alone is enabled, and
outside attempts to change device configuration
exceeded the set Tamper limit
Resolution:
Identify source of tampering. If configuration changes
are required, contact a qualified individual to unlock
the Write Protection Mode feature and disable the
Tamper Mode and make the required updates.
Meter Body
Unreliable Comm
Possible causes:
Either the transmitter is installed in a noisy
environment or internal communication quality
between the Electronics Module and Sensor is
degrading.
Resolution:
Call service person.
Loop Current Noise
Possible causes:
If this is observed frequently, it is an early indication of
critical under/over-current failure.
Resolution:
Closely monitor the device status for indications of
other failures, or proactively replace the Electronics
module.
AO Out of Range
Possible causes:
Calculated Analog output is either above or below the
specified Loop Current Limits. The transmitter input is
not in specified range.
Resolution:
Check the transmitter input and verify the configured
operating range.
