Honeywell SmartLine STT700 DE, User Manual

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Revision 1
STT700 Series HART/DE Option User’s Manual
Page 95
8.2.3 Cold Junction Tracking
The below table provides the diagnostic details related to Cold Junction temperature tracking such as
high /low value recorded and retention of the record into Non-Volatile Memory (NVM) of the
transmitter.
The table lists the methods to configure the limits for tracking Cold Junction Low and
High values and methods to read the recorded diagnostic parameter values.
Table 16
– Cold Junction Tracking
Cold Junction
High or Low
Values Cold
Junction Low
Value Method Description Executing this method will give the
details of lowest temperature
experienced by the device along with
time stamp
Set-up None - value initialized to Max SV Limit
value prior to leaving the factory.
Updates to current CJ temperature are
automatic when powered at installation
location after one minute.
NVM Update after every 7.5 hours.
Cold
Junction High
Value Method Description Executing this method will give the
details of Highest temperature
experienced by the device along with
time stamp.
Set-up None - value initialized to Min SV Limit
value prior to leaving the factory.
Updates to current CJ temperature are
automatic when powered at installation
location after one minute.
NVM Update after every 7.5 hours.
Cold Junction
High or Low
Alarm Counter
Cold Junction
Low Alarm
Limit Parameter Description CJ temperature (SV) lower operating
limit from specification.
Set-up None.
NVM Backup immediately into NVM
Cold Junction
Low Alarm
Counter Parameter Description Counter that counts the number of
times SV crosses below the SV Low
Alarm Limit.
Set-up None
NVM Backup immediately into NVM
Cold Junction
High Alarm
Limit Parameter Description CJ temperature (SV) upper operating
limit from specification.
Set-up None.
NVM Backup immediately into NVM
Cold Junction
High Alarm
Counter Parameter Description Counter that counts the number of time
SV crosses above the SV High Alarm
Limit.
Set-up None
NVM Backup immediately into NVM
Change Cold
Junction
Alarm Limits Method Description Executing this method will allow user
to change Cold Junction high and low
alarm limit
Set-up None
– initialized to zero prior to
leaving the factory.
NVM Backup immediately into NVM