Kaye Validator AVS, User Manual

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Chapter 7. Calibrating and Verifying Sensors
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), you can enter the IRTD
stability value manually in your setup.
The stability calculation begins once the temperature reference is within 5 degrees of setpoint.
Sensor and IRTD readings are displayed on the Data screen with a red background until they
reach stability. To achieve stability, the IRTD and all sensors must meet the stability criteria
defined in the setup.
When stable, the sensor and IRTD readings change to a green background. If any sensors fail
to reach stability, the calibration process remains there.
To end terminate the calibration process, press Cancel .
7.4.3 Calculate Deviation of Uncalibrated Sensors
When the IRTD and all sensors reach stability, the Kaye Validator calculates deviation by
comparing each uncalibrated sensor to the IRTD, and then logs the stability and uncalibrated
deviation data to the calibration report file. The Kaye Validator marks any sensor outside the
deviation criteria as failed. When uncalibrated deviation is complete, the Kaye Validator
calibrates all sensors that passed uncalibrated deviation at the low setpoint.
7.4.4 Calculate Deviation of Calibrated Sensors
The Kaye Validator then calculates calibrated deviation. The corrected results for each sensor
are compared to the IRTD, and logged and displayed on the Data screen every 30 seconds for
the time period specified in the setup. Sensors that fail the calibrated deviation evaluation are
displayed with a red background, and marked as failed in the calibration report file.
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