Honeywell STT850 Series - AVDD Tracking Diagnostics; Sensor CPU Temperature Tracking Diagnostics; Table 22 - Maximum and Minimum AVDD Tracking; Table 23 - Maximum Sensor CPU Temperature Tracking

Page 90 STT850 Series HART/DE Option User’s Manual Revision 4.0
8.2.8 AVDD Tracking Diagnostics
Table 22 – Maximum and Minimum AVDD Tracking
Max AVDD
Parameter
Description
Maximum Sensor Supply Voltage
experienced by device since last reset
of voltage parameters.
Time since last
AVDD Up
Method
Description
Displays time since last Sensor
Supply Voltage was above last Max
AVDD
Min AVDD
Method
Description
Minimum Sensor Supply voltage
experienced by device since last reset
of voltage parameters.
Time since Last
AVDD Down
Method
Description
Displays time since last Sensor
Supply Voltage was below last Min
AVDD
8.2.9 Sensor CPU Temperature Tracking Diagnostics
Table 23 – Maximum Sensor CPU Temperature Tracking
Max Sensor CPU
Temp.
Parameter
Description
Maximum Sensor CPU Temperature
experienced by device
Set-up
none
Time Above
Upper Stress
Limit
Parameter
Description
Accumulation of minutes that Sensor
CPU Temperature has been above
the value of Max Sensor CPU Temp.
Set-up
None.
NVM
Backup once each 8 hour period
Time Since Last
Sensor CPU
Temp. Up
Method
Description
Time that has passed since the last
time Sensor CPU Temp has passed
above the value of “Max Sensor CPU
Temp” (in days, hours and minutes).
Set-up
none
NVM
Backup once each 8 hour period
Table 24 – Minimum Sensor CPU Temperature Tracking
Min Sensor CPU
Temp.
Parameter
Description
Minimum Sensor CPU Temperature
experienced by device
Set-up
none
Time Below
Upper Stress
Limit
Parameter
Description
Accumulation of minutes that Sensor
CPU Temperature has been below
the value or Min Sensor CPU Temp.
Set-up
none
NVM
Backup once each 8 hour period
Time Since Last
Sensor CPU
Temp. Down
Method
Description
Time that has passed since the last
time Sensor CPU Temperature has
passed below the value of “Min
Sensor CPU Temp” (in days, hours
and minutes).
Set-up
none
NVM
Backup once each 8 hour period