Honeywell STT850 Series, Руководство пользователя

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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