Chapter 7. Calibrating and Verifying Sensors
Kaye Validator AVS User’s Manual 82
calibrated, the temperature and stability readings of the IRTD, and the required setpoint.
The header includes the study name, temperature point (high, low or checkpoint), and the
Graph and List View icons. Under the header, three blocks correspond to the low, high and
check points, with the temperature set points displayed at the top of each block along with °C
or °F. Each block also has an interior header with the heads Temperature, Stability and
Deviation. (On the first block, the additional header Label lists the relevant data for
a
particular
label -- IRTD set point, SIM number, Sensor Label -- for each row. If the list exceeds
the screen size, you can scroll vertically through the remaining data. The Stop Calibration
button enables you to stop calibration.
If the stability point for any particular sensor is reached, that point is replaced with a green tick
mark. However, if the deviation of any sensor is not within the specified limit, the deviation
appears in red.
Note: All calibration offsets will be deleted from the SIMs if the calibration parameters or
temperature units of the new setup are different than the calibration parameters or
temperature units of the setup currently in memory.
Calibration offsets for sensors at each setpoint are written to the SIM when the calibration
process is complete. If you stop calibration, calibration offsets already calculated are not
written to the SIMs, and the calibration report file is deleted.
7.4.1 Automatic, Semi-Automatic or Manual Mode
When you start calibration, the Kaye Validator AVS software detects whether or not a Kaye
temperature reference and an IRTD are connected. Both are required for fully automatic
operation. If either the Kaye temperature reference or the IRTD is not found calibration
verification switches to semi-automatic mode. If neither can be found, calibration verification
switches to manual mode.
7.4.2 Calculate Stability
The first step in the calibration process is to verify that the sensors and IRTD are stable.
Stability is the maximum allowable change in temperature for each sensor and the temperature
standard over a specified time interval. The maximum allowable change in temperature for the
IRTD is fixed at 0.012°C (0.022°F) if all temperature setpoints are equal to or greater than
0.0..C (32.0°F). If any temperature setpoint is less than 0.0°C (32.0°F), it is possible to change
the IRTD stability value manually in your setup.
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