Chapter 10: Sensor Verification
Kaye ValProbe RT User Manual
97
During the verification process, live data can be displayed in two ways, in a Graph view and a
List view. If the list exceeds the screen size, you can scroll vertically through the remaining
data. On the graph, temperature appears on the Y-axis, while the highlighted X-axis displays
the stabilized IRTD temperature. All sample points that lie within the deviation specified are
displayed as dots along with the label and the temperature point of the sensor. Samples that
deviate from specification are displayed as red dots along with a sensor label, temperature
point, and a value indicating how much the sensor is off.
Figure 110: Temperature Verification Graph View
The first step in the Verification process is to verify that the IRTD is stable. Stability is the
maximum allowable change in temperature for the temperature standard over the specified
time interval. The maximum allowable change in temperature for the IRTD is fixed at 0.012°C
if all temperature setpoints are equal to or greater than 0°C. If any temperature setpoint is
less than 0°C, it is possible to change the IRTD stability value manually in your setup.
The stability calculation begins once the temperature reference is within five degrees of the
setpoint. Sensor and IRTD readings are displayed on the Data screen. To achieve stability,
the IRTD must meet the stability criteria defined in the setup.
When the IRTD is stable the Stability textbox changes from red to green and a timestamp
appears in the Time of Stability textbox. At the same time, the duration of stability starts to
count the time at stability. If IRTD gets unstable, the process starts restarts. When duration of
additional time at stability meets the criteria the textbox changes to green and the setpoint is
considered fulfilled.
Each setpoint that has met the criteria is displayed in green. Once all setpoints are met, the Study
data from the Loggers can be read, click the green
Read
button to transfer the Logger and Base
Station data to the Validation Console. If the
Read
button is not green, the setpoints are not
completed.
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