Revision 1
STT700 Series HART/DE Option User’s Manual
Page 97
8.2.4 CT Tracking Diagnostics
The below table provides the diagnostic details related to Core Temperature such as high / low values
recorded and retention of the record into Non-Volatile Memory (NVM) of the transmitter.
The table
lists the methods to read the diagnostic parameter values.
Table 17
– Core Temperature Diagnostics
Core
Temperature
(CT)
Parameter
Description
Core Temperature Value. Units are same
degree units as selected for SV
(Secondary Variable).
Set-up
None.
CT High Value Parameter
Description
Highest core temperature experienced by
the device.
Units are same degree units as selected
for SV (Secondary Variable).
Set-up
None.
NVM
Update every 7.5 hour.
CT Up Count
Parameter
Description
Counter that counts Core temperature (CT)
exceeding upper operating limit from
specification.
Set-up
None.
NVM
Update every 7.5 hour.
CT Up Event
Method
Description
Executing this method will give details of
the time since last event in minutes
Example
Core Temperature range is -40
C (-40
F)
to 125
C (257
F) for a total span of 165
C
(329
F).
CT Up Event will log when CT is greater
than -10% of CT Max value
Set-up
None
– calculation is automatic.
NVM
Update every 7.5 hour.
CT Low Value
Parameter
Description
Lowest core temperature experienced by
the device.
Units are same degree units as selected
for SV (Secondary Variable).
Set-up
None.
NVM
Update every 7.5 hour.
CT Down
Count
Parameter
Description
Counter that counts, Core temperature
(CT) exceeding lower operating limit from
specification.
Set-up
None.
NVM
Update every 7.5 hour.
CT Down
Event
Method
Description
Executing this method will give details of
the time since last event in minutes.
Example
Core Temperature range is -40
C (-40
F)
to 125
C (257
F) for a total span of 165
C
(329
F).
CT Down Event will log when CT is less
than 10% of CT Min value
Set-up
None
– calculation is automatic.
