Honeywell STT850 Series - Table 16 - Minimum PV Tracking

Revision 4.0 STT850 Series HART/DE Option User’s Manual Page 85
Table 16 – Minimum PV Tracking
LTL
(Min PV Limit)
Parameter
Description
Lower Transducer Limit:
PV(temperature) specified lower
operating limit in user-selected units
Set-up
None.
PV Lower Limit
for Stress
Condition
Method
Min PV
Parameter
Description
Minimum PV that the device has
experienced in user selected units.
Set-up
None. Value initialized to Max 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 Below
Lower Stress
Limit
Parameter
Description
Accumulation of minutes that
Temperature measured by the device
has been below the value of “PV
Lower Stress Limit”.
Set-up
None.
NVM
Backup once each 8 hour period
Time Since
Last PV Down
Method
Description
Time that has passed since the last
time device’s PV passed below the
value of “PV Lower 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