Sensor General Diagnostics; Device Diagnostics - Honeywell ST700 User Manual

The Sensor Voltage Diagnostics are also updated based on the selection in the Upload
Track Data. Max AVDD and Min AVDD are the maximum and minimum values of the
VDD recorded by the sensor module in its life time and Max AVDD Time stamp and Min
AVDD Time stamp are the corresponding time stamps at maximum and minimum values.

Sensor General Diagnostics

ATTENTION
Note that the sensor stress monitor is different from the device stress
monitor. The stress monitor of the sensor depends on other parameters such
as pressure, temperature, and meterbody temperature.
Stress monitor
It is the amount of time the device has been used under stressful conditions. For example,
say temperature of the sensor. The stress monitor is based on the temperature of the sensor.
The Stress monitor is calculated in percentage.
Stress monitor of sensor =
Time in Service
It is the amount of time the sensor is in operation and is shown in minutes.
Service Life
Service life indicates the amount of service life that has been consumed by the sensor.
Service Life is dependent on the temperature of the sensor only. The Service life is
calculated in percentage.

Device Diagnostics

Electronic Temperature Diagnostics
Similar to the sensor diagnostics, the Electronic Temperature Diagnostics are also
tracked in 7 ways: Max Electronic Temperature and Min Electronic Temperature are
the maximum and minimum electronics temperatures recorded by the communication
module electronics in its life time and Electronic Temperature Unit is the engineering
unit currently under use which is set in the pressure basic block. ET Over Range CTR is
the accumulation of minutes the device is above the maximum specification limit less 10%
of range (for the range of -40 Deg C to 85 Deg C it is 85Deg C – 12.5Deg C = 72.5 Deg C)
and ET Over Range Date is the date and time when the electronic temperature last passed
above the maximum specification limit less 10% of the range. The ET Under Range CTR
is the accumulation of minutes the device is below the minimum specification limit plus
10% of range (for the range of -40 Deg C to 85 Deg C it is -40Deg C + 12.5Deg C = -27.5
Deg C) and ET Under Range Date is the date and time when the electronic temperature
last passed above the maximum specification limit less 10% of the range.
Page 34 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide
Temperature conditions + Pressure conditions
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Timing service of the device
Revision 2.0