Honeywell ST 800 Series User Manual page 98

Status Type
(continued)
Non critical status
(Warning)
Page 90
Device Status
(HART Command
48)
Low Supply Voltage
No DAC Calibration
Tamper Alarm
Meter Body
Unreliable Comm
Loop Current Noise
AO Out of Range
ST 800 Series HART/DE Option User's Manual
Details/Resolutions
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.
Possible causes:
No DAC calibration has been performed on the
device.
Resolution:
Perform DAC calibration for precise analog output
measurement.
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.
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.
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.
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.
Revision 5.0