Pv Tracking Diagnostics; Table 15 - Maximum Pv Tracking - Honeywell ST 800 Series User Manual

PV Tracking Diagnostics

UTL (Max PV Parameter
Limit)
PV Upper Method
Limit for
Stress
tracking
Max PV Parameter
Time Above Parameter
Upper Stress
Limit
Time Since Method
Last PV Up
Revision 5.0
Table 15 – Maximum PV Tracking
Description
Set-up
Description for DP
type
Example for DP
Type
Example for AP
and GP Types
Set-up
Description
Set-up
NVM
Description
Set-up
NVM
Description
Set-up
NVM
ST 800 Series HART/DE Option User's Manual
Upper Transducer Limit: PV(pressure)
specified upper operating limit in user-
selected units
None.
Actual limit value used to note "Time
Above Limit" and "Time Since Last
Event". "PV Upper Stress Limit" value is
equal to Upper Transducer Limit less
10% of Transducer limits range.
For STD120 span is 0 to 400 inH
Range is 400 inH O settable within
2
LTL = -800 inH O to UTL = 800 inH
2
limits.
"PV Upper Stress Limit" =
800 inH O - 160 inH O = 640 inH
2 2
For STA140 allowable working pressure
is 0 to 500 psia.
Withstand Pressure from LTL = 0 to UTL
= 750 psia.
"PV Upper Stress Limit" = 750 psia – 75
psia = 675 psia.
None – calculation is automatic.
Maximum PV that the device has
experienced in user selected units.
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.
Update after every 8 hours.
Accumulation of minutes that pressure
measured by the device has been above
"PV Upper Stress Limit".
None – initialized to zero prior to leaving
the factory.
Backup once each 8 hour period
Time that has passed since the last time
device's PV passed above "PV Upper
Stress Limit" (in days, hours and
minutes).
None – initialized to zero prior to leaving
the factory.
Backup once each 8 hour period
O.
2
O
2
O.
2
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