Honeywell ST 800 Series, User Manual

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Page 80 ST 800 Series HART/DE Option User’s Manual Revision 5.0
TV Tracking Diagnostics
Table 19 – TV Tracking Diagnostics
Max TV Limit Parameter Description Static Pressure upper operating limit
specification.
Units are always PSI (pounds per square
inch).
Set-up None.
Max TV Value Parameter Description Highest SP ever experienced by the
device.
Units are always PSI (pounds per square
inch).
Set-up None.
NVM Backup once each 8 hour period
Time Above
Upper Stress
Limit Parameter Description Accumulation of minutes that device’s SP
has been above the value of “SP Upper
Stress Limit”.
Set-up None.
NVM Backup once each 8 hour period
Time Since
Last TV Up Method Description Time that has passed since the last time
device’s SP has passed above the value of
“SP Upper Stress Limit” (in days, hours,
and minutes).
Set-up None.
NVM Backup once each 8 hour period
ET Tracking Diagnostics
Table 20 – Maximum ET Diagnostics
Max ET Limit Parameter Description Electronics Temperature (ET) upper
operating limit from specification.
Units are same degree units as has been
selected for SV (Secondary Variable).
Set-up None.
ET Upper
Limit for
Stress
Condition Description Actual limit used in “Time Above Limit” and
“Time Since Last Event”. Value is equal
to “Max ET Limit” less 10% of limits range.
Example
Electronics Temperature range is -40
°
F to
185
°
F for a total of 225
°
F.
“ET Upper Stress Limit”= 185
°
F - 10% of
225
°
F = 162.5
°
F.
Set-up None – calculation is automatic.
Max ET Value Parameter Description Highest Electronics Temperature ever
experienced by the device.
Units are same degree units as has been
selected for SV (Secondary Variable).
Set-up None.
NVM Update every 8 hour.
Time Above
Upper Stress
Limit Parameter Description Accumulation of minutes that device’s
Electronics Temperature has been above
the value of “ET Upper Stress Limit”.
Set-up None.
NVM Backup once each 8 hour period