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Calibration is the process used to maintain accurate data output on technical machinery. As with any piece of technical equipment, vacuum machinery that displays or otherwise outputs data will gradually lose the accuracy of its readings. The process of calibration collects and measures data over a period of time, comparing the results with a set standard for that particular machine, then uses this information to adjust and configure the instrument for optimal accuracy.
IMPAK Corporation offers calibration services, by way of a third party lab, for all machines with calibration ports, including the calibration of temperature, pressure and timing functions. Below is a brief outline of the calibration process by which these tasks are performed.
- Temperature Calibration - First the sensing thermocouple for the machine is disconnected from the chassis connector. A thermocouple simulator is then plugged in and temperatures from 100°F to 500°F are injected in 50° F increments. Each point is documented on a data sheet as the "Nominal" values, and then the "As Found" values. These values are compared to each other and if the "As Found" values fall within the accuracy specifications then this process is completed. If the unit requires adjustment, then after the adjustment is completed, the temperature points are then repeated to ensure accuracy and documented under the "As Left" values.
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- Pressure Calibration - The pressure on the system is reduced by turning the pressure regulator down as low as it will go. A standard pressure gage is connected to the calibration port on the rear of the unit. After ensuring that the standard is indicating zero as well as the pressure gage on the instrument, the pressure regulator is readjusted for the first pressure point required as indicated on the standard pressure gage. A reading is taken on the instrument gage and that reading is annotated on the data sheet under "As Found" values. This process is repeated for the remaining points required and all readings documented. The regulator is reduced to zero and the standard pressure gage removed. If the gage requires adjustment, this process is repeated after adjustment is completed to ensure the instrument is within specification.
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- Timing - Timing - The first point on the timer required for calibration is set. The sealing process is started and the time compared to a standard stopwatch. The process is repeated several times. Upon completion, the timer is set for the remaining test points and run again. All readings are documented on the data sheet under "As Found" values. If the instrument requires adjustment, the process is repeated after adjustment is completed.
For more information, please contact our Technical Department
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