Page 84
STT
850 Series HART/DE Option User’s Manual
Revision 4.0
8.2.2 PV Tracking Diagnostics
Table 15
– Maximum PV Tracking
UTL (Max PV
Limit)
Parameter
Description
Upper Transducer Limit: PV(temperature)
specified upper operating limit in user-
selected units
Set-up
None.
Max PV
Parameter
Description
Maximum PV that the device has
experienced in user selected units.
Set-up
None. Value initialized to Min PV Limit
value prior to leaving the factory.
Updates to current PV automatically
when powered at user site after one
minute.
NVM
Update after every 7.5 hours.
Time Above
Upper Stress
Limit
Parameter
Description
Accumulation of minutes that
Temperature measured by the device has
been above “PV Upper Stress Limit”.
Set-up
None
– initialized to zero prior to leaving
the factory.
NVM
Backup once each 7.5 hour period
Time Since
Last PV Up
Method
Description
Time that has passed since the last time
device’s PV passed above “PV Upper
Stress Limit” (in days, hours and
minutes).
Set-up
None
– initialized to zero prior to leaving
the factory.
NVM
Backup once each 7.5 hour period
